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1561  Camaro Research Group Discussion / Originality / Re: 1969 Z/28 motor mounts on: February 27, 2013, 12:49:04 AM
FirstGen..  Thanks for that older reference; it was helpful reading more background.   From all of this, I've gotten the idea that there were one or more changes in motor mount PN and/or configuration thru the '69 production year, so we should try to ascertain when the changes were (I think JohnZ had a post in the thread you refefrenced which identified May, June and maybe August of 69 for changes), and what parts were used when.   The change to the '70 motor mount may indeed have been before the actual '69 Camaro production ceased, so that is still an open question in my mind.

I think the (3" wide) Anchor motor mount that the parts store sold me may have been for the big block; Are the big block frame stands wider (3"?) as opposed to the small block frame stands 2-3/8 to 2.5" width?
1562  Camaro Research Group Discussion / Originality / Re: 1969 Z/28 motor mounts on: February 26, 2013, 06:02:51 PM
I have original 3886466 mounts, as well as a pair of original '#3963700blk/3962748green/3972740gold  3974735gold nut and3980701' *(the one with all the PN's molded on the side of the rubber); mine had no paint left, so I'm unsure what pn it was sold as but I'm going to call it 3962748 to be consistent with what I called it in the earlier posts.   I also have just purchased 2 Anchor 2283 parts; they are identical in appearance and all measures to the 3962748 parts.

                                                                           GM 3886466               GM 3962748/Anchor 2283                       *Anchor 2267*             

A.  WIDTH = distance between the fwd                                2-1/2 "                                2-1/2" (-)                                            3"
and aft 'pin hole' (which straddles the frame stand)

B.  THICKNESS =Distance from center                                  1-5/8"                                    2"                                                   1-1/2"
of Pin hole to the block surface (back of mount)

C.  OFFSET  =  distance in plane of block                               1-1/2 "                                1-1/2 "                                              1-1/2 "
surface from the top row of holes in the mount
to the block, and the 'pin hole'  for the engine
retaining bolt.

*   I'm not certain these Anchor mounts are 2267, as I've tossed the boxes and they aren't labeled, but they are what the local auto parts store sold me
for 'small block' mounts (and 2267 is what Anchor shows as 'correct' for small block Chevy V8 - but they aren't correct for the 302/Z28 engine.

**   The width of the frame stands as measure on my car are ~ 2-3/8" ...

***  The Anchor 2283 appears identical to the GM 3962748 part, with exception of the molded PN's on the 2748...
1563  Camaro Research Group Discussion / Originality / Re: 1969 Z/28 motor mounts on: February 26, 2013, 12:06:58 AM
I've got several of these mounts and I will take some measurements to go with the photos tomorrow and post them.  
For tonight, I thought I'd share with you all what the Chevrolet Parts and Accessories catalog, 30A, effective October 1, 1970 has for group 0.027   MOUNTING ASSY. - MOUNTING UNIT, Engine (also see group 4.081).   This shows what Chevy was selling across the counter and using in their service department less than a year after the '69 Camaro production stopped.  This catalog covers 62-70 Passenger cars, Chevelles, and Novas, and '67-70 Camaros.
What is interesting to me was that the original type mount posted in photos earlier by a couple of folks with the thick rubber at one end of the thru bolt to hold the engne mounting to the frame stand, seems to have been available in 'mirror' images for the left and right side...?   (Types B and D in the illustrations).
1564  Camaro Research Group Discussion / Originality / Re: RPO U17 - firewall hole size on: February 25, 2013, 09:30:52 PM
My late 09C Z28 has the flat bottom Air Cleaner, although most of the parts on the car, including the engine, are dated late August.
1565  Camaro Research Group Discussion / Originality / Re: 9204 brake booster on ebay on: February 24, 2013, 03:28:41 PM
I just commented that it *could* have been, but when I cleaned it, there was also a residue of the gold chromating... so I suspect it was 'spray bombed' before I bought it in '76, and then I do remember 'touching up all the black'..      hot rodder that I was.. Smiley   I'm fairly certain this is the original booster; the two owners before me were not 'car people' (a teenage girl and an undercover policeman -  who had it only a short time).   The car had been kept washed/waxed and cleaned (appearance wise), but there had been little maintenance done in the '60K or so miles it had on it when I got it.   Of course, there's no way of knowing 40+ yrs later, or even 7 yrs later, when I purchased it.
Note:  The dates on the brake switch (9-199) exactly match the julian date on the booster; the master cylinder was dated 175... further making me believe all those parts are original to the car, as was 99-100% of the parts when I purchased it.
1566  Camaro Research Group Discussion / General Discussion / Re: Sunoco 260 on: February 24, 2013, 01:41:43 PM
Great Info JohnZ..  Smiley   and SUPER photos...   I always love seeing pix of your auto den..   uh...  I mean..  garage.. Smiley
1567  Camaro Research Group Discussion / Originality / Re: z28 front backing plate and steering bracket bolt finish on: February 24, 2013, 01:37:55 PM
John is correct (as usual)  Smiley ; the bolts are 'dark' and appear to have been phosphated.   I was thinking that they weren't painted (which they weren't).  I had to go peek at my photos,and I also see that I was wrong about the 'orange and blue' paint splashes; what I was recalling as 'orange' actually appears to be pinkish?   see photos attached.
1568  Camaro Research Group Discussion / Originality / Re: 69 Z28 Radiator Re-coring ? on: February 24, 2013, 12:15:41 PM
OK..   after a month or so with my radiator at the shop, the shop gave up on finding a 'stock appearing' core that would satisfy me, so I picked up my radiator (I hate having my parts sit around in a shop longer than necessary!).   

My hope is that I can find a proper core for the '69 Z28 Camaro, that the local radiator shop couldn't find.    I will call the 'Tanks and Tabs' shop (suggested by Steve) in Nashville on Monday morning, but I'm interested in ANY manufacturer that you guys might know of who makes replacement cores for our cars?

I took several photos and measured the core size:   
It's a 3 row;  21" wide, 17" tall (not counting the top/bottom braces), and 2" thick.

Note:  The braces top and bottom, which are apparently unique as this was the issue with my local radiator shop, are soldered in almost a continuous way across the top and bottom of the core, and my shop was not confident they could remove and replace them on a new core.   The new cores available to the local shop had a totally different top/bottom brace.
1569  Camaro Research Group Discussion / Originality / Re: z28 front backing plate and steering bracket bolt finish on: February 24, 2013, 11:57:23 AM
My understanding is they weren't painted; ie. bare metal.. Mine didn't show any evidence of having ever been painted, but when I cleaned my parts up, I found some orange and blue paint splashes (for id?) on the spindle eye mounts...
1570  Camaro Research Group Discussion / Originality / Re: 9204 brake booster on ebay on: February 24, 2013, 12:27:46 AM
TO my knowledge it has never been changed.   It was on the car when I bought it in 1976, and it's 'dated' appropriately for my 09C car??   but everything is speculation/educated guesswork after 44 yrs..  Smiley
1571  Camaro Research Group Discussion / Originality / Re: 9204 brake booster on ebay on: February 23, 2013, 10:16:26 PM

My car is a LATE 09C (Sept 1969)..  I'm sorry if that throws a kink in your data.. Smiley
1572  Camaro Research Group Discussion / Originality / Re: 1969 Z/28 motor mounts on: February 23, 2013, 12:24:19 PM
The Lucas restoration photos and others have had the drivers side mount changed sometime in the cars history, probably the engine mount recall program GM had back in 69 by GM dealers . Very common to see that type mount, the original type mounts I posted are very rare to see, especially the drivers side as it allways broke due to Engine Torque.
 When I ran the Corvette/Camaro shop we put lots of headers on and had to manipulate ( Bend) headers into proper postion lots of time. Put the car on a hoist and insert  long 2x4 trimed to fit into the collector and get someone to help you carefully pull down on the 2x4 gradually until you have the clearnce needed. You would be surprised how easily they will move. The trick is to gradually pull so as not to kink tubes or break welds. Done it lots, it works.
I appreciate your comment;  I've leaned on the header a bit when I installed them the first time, but was afraid of breaking apart welds with too much effort?   GIven your suggestion, I suppose I'll just use your 2x4 suggestion and 'lean harder' and see what happens..  Smiley
1573  Camaro Research Group Discussion / Originality / Re: 1969 Z/28 motor mounts on: February 23, 2013, 12:15:53 PM
Tmodel66 posted: 
"Gary after re-reading your post I believe your problem is the header. You have changed nothing except the header so it has to be. My reasoning is you said the Anchor are like your originals so your originals were working before the headers.  Correct?"

Well.  the GM 3962748 mounts may have come from a '70 LT1 I had, rather than the '69 Z28.    those mounts are shown as 'original' for the '70 350 engines in the '70 P&A catalog.   I now suspect the problem is the headers, although I'm not perfectly confident about the mounts, since I don't have the original 302 mounts.  As many have said, Chevy used non-interlocking mounts from '55 thru '69? and they often broke apart due to engine torque.  I've changed out many over the years on various small block chevys I've owned when the mounts were in 'two parts' when removed. Smiley   Seems chevy tried many solutions to the 'engine torque' issue before they finally addressed it..  ie. the 'tie down' mod/recall, and I suppose finally the interlocking mount.  I still need to decide which of the mounts I have is 'closest' or 'most acceptable in original unrestored judging' or survivor classes before I put my engine back in.
1574  Camaro Research Group Discussion / Restoration / Re: Where to send starter for rebuild. on: February 22, 2013, 11:09:28 PM
I second what Lynn posted; it's not much to a starter motor..  cleaning, lubing bearings/bushings, and possibly replacement of brushes usually takes care of it.   The solenoid is a separate animal, but can also usually be cleaned and made to work.
1575  Camaro Research Group Discussion / Originality / Re: 1969 Z/28 motor mounts on: February 22, 2013, 11:02:37 PM
the mount photos posted by 1968 Z28 (from Lucas Restorations) seem to match at least some of the ones that were said to be original, with one interlocking mount (2748?), and one non-interlocking (GM 3939728?).   Paceme and first gen addict both said their cars had the interlocking mount on the LHS, and the non-interlocking one on the right...  that seems to be what is pictured in the Lucas Restoration photos.
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