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102435 Posts in 12087 Topics by 4667 Members
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3841  Camaro Research Group Discussion / Decoding/Numbers / Re: 1969 SS on: March 11, 2006, 11:57:18 AM
The trans was built on January 19, 1965, and is out of a '65 Chevelle built at Fremont, California; no way to tell by looking at it whether it's an M20 or M21.
3842  Camaro Research Group Discussion / Originality / Re: Correct Oil fill cap for 68 327 on: March 10, 2006, 01:37:34 PM
Not sure about the '68 Camaro, but '66-'68 SB Corvettes used the same block/intake configuration, and they had a sealed twist-on cap and a PCV valve threaded into a bung on the fill tube with a hose to the carb base as one side of the PCV system, and the other (intake) side was an adapter in the hole in the back of the block next to the distributor with a large rubber hose that connected to an elbow in the air cleaner base.
3843  Camaro Research Group Discussion / Originality / Re: 1969 z/28 x-77 trunk mat on: March 08, 2006, 12:05:32 PM
The only way an X77 with a standard interior would have hood insulation would be if it had the ZL2 hood, which included the hood pad regardless of its application. Otherwise, only Z87 deluxe interior cars had a hood pad.
3844  Camaro Research Group Discussion / Decoding/Numbers / Re: 1967 RS/SS on: March 07, 2006, 10:57:14 AM
Can you post a photo of the cowl tag? RPO numbers (L35, Z22, etc.) were never stamped on the cowl tag.
3845  Camaro Research Group Discussion / Decoding/Numbers / Re: LT1 Question and For Sale on: March 07, 2006, 10:52:58 AM
Kurt,
You are quite correct the 350/255hp was a 4 barrel,(I made an err)the 350/250hp was the 2 barrel .Although there was a 350/350 hp available in the Corvette in 1969 I'm not sure if GM was calling it the Lt1,but it did use most of the same componets as the 70's Lt1,it's odd that it used a rochester instead of a holley though.

The '69 Corvette L-46 350/350 was a Q-Jet-carbed hydraulic-cam engine, just like the '68 L-79 327/350 that preceded it.

Block casting numbers have virtually nothing to do with the configuration of a finished engine, which is why folks get confused when they look up a casting number on Mortec and think they have a 302 (or other low-volume engine). The 3970010 block is a good example of that - over seven MILLION of those blocks were cast from 1969-1979, and they were used for every 350 application imaginable, in both cars and trucks, and only one-third of 1% of them were assembled as 302's. Blocks are blocks, and none of them were cast for a specific finished application; the only thing that made them different was the components installed in them and the pad stamp that identified their internals and vehicle application.
3846  Camaro Research Group Discussion / Originality / Re: Correct finish(es) on 69 12-bolt Camaro rear on: March 04, 2006, 10:47:56 AM
As I posted above, the axle SHAFT wasn't painted at all; put the drums on, mask the studs, and paint the entire assembly. The pinion flange was installed at the axle plant, generally didn't get paint on it, and wasn't touched at the car assembly plant except to attach the prop shaft rear U-joint.
3847  Camaro Research Group Discussion / Restoration / Re: john z on: March 03, 2006, 10:23:15 AM
I'm not familiar with that detail on Firebirds - don't know if they used the same/similar A/C components as the Camaro used; you might look at the Camaro assembly manual and the A/C system schematic and see if it looks like the pieces in your car.
3848  Camaro Research Group Discussion / Originality / Re: Question of build date vs. rear assembly date on: March 03, 2006, 10:19:54 AM
The "selection" process was simple - the operator looked at the Chassis Broadcast, took his hoist to the rack with those axles, grabbed the next axle in the rack, and loaded it on the chassis carrier; nobody paid any attention to dates. The axle racks came out of the rail car, were stacked in off-line storage, and were taken to the line one rack at a time. Axle racks held four axles each.
Quote

Thanks for chimming-in on this John. I was hoping you were on-line.

John, that makes perfect sense. However, how does a rear just "sit around" in a rack
for 4 months before it gets selected. If a rack only held 4 rears, it would stand to reason
that the racks were turned-over on a daily or regular basis. This is the cause for my confusion.

Kurt, by the way, I am referring to a 1970 model.

Steve
Quote

Who knows - lots of weird things happened occasionally in the production system in those days; that's why the NCRS allows full credit for dated components up to six months prior to the car's final assembly date in Corvette Flight Judging, although 2-6 weeks is "typical".
3849  Camaro Research Group Discussion / Originality / Re: Question of build date vs. rear assembly date on: March 03, 2006, 10:14:08 AM
JohnZ, I notice your Z/28 was built 02D at Norwood as was my L78. My vin is xx5415. Where is your car from mine. About 15 years ago I came across a Z/28 close to where I live that was built 5 cars away from mine.

Loren

Mine is 606402, built a little more than two shifts after yours.
3850  Camaro Research Group Discussion / Originality / Re: Correct finish(es) on 69 12-bolt Camaro rear on: March 03, 2006, 10:07:30 AM
The axle SHAFT itself wasn't painted; the complete axle ASSEMBLY was painted after the drums were installed, as the last operation before the axle was placed in the shipping rack. I don't recall ever seeing any protetctive sleeves on the lug studs, but they avoided painting the pinion flange where the U-joint attached.
3851  Camaro Research Group Discussion / Maintenance / Re: Muncie 4 spd. oil? on: March 01, 2006, 11:29:11 AM
They work just fine with the lube they were originally designed, developed, and durability-tested with; ordinary 75W90 or 80W90 gear lube. Don't use a lube that contains a Posi friction-modifier additive - it will slow down the synchronizer action.
3852  Camaro Research Group Discussion / Restoration / Re: heater-a/c vaccum lines on: March 01, 2006, 11:24:51 AM
Do you have the '69 Pontiac Shop Manual and Firebird Assembly Manual?
3853  Camaro Research Group Discussion / Originality / Re: Question of build date vs. rear assembly date on: March 01, 2006, 11:18:47 AM
Kurt S can probably tell you how that spread compares to other similar cars in the database, but the original 4.10 axle in my 02D '69Z is dated February 19th (the car came off the line on February 27th).

The "selection" process was simple - the operator looked at the Chassis Broadcast, took his hoist to the rack with those axles, grabbed the next axle in the rack, and loaded it on the chassis carrier; nobody paid any attention to dates. The axle racks came out of the rail car, were stacked in off-line storage, and were taken to the line one rack at a time. Axle racks held four axles each.
3854  Camaro Research Group Discussion / Originality / Re: 69 ZL2 Coil Bracket: How to ID? on: March 01, 2006, 11:09:14 AM
That's my "driving" setup, with full manifold vacuum (from the tee in the choke pull-off hose, which normally feeds the diverter valve) to the vacuum advance can; for "show", the cap comes off the end of the original steel line, the original short striped hose to the vacuum advance goes back on, the long piece of hose comes off, and the (plugged) diverter valve hose goes back on the choke pull-off tee.

The factory setup used "ported" vacuum to the distributor vacuum advance as an emissions "band-aid" to retard idle spark timing to increase idle exhaust gas temperature to improve the "afterburn" in the exhaust manifolds with A.I.R., but it also caused idle instability, idle and traffic cooling issues, and poor throttle response. Doesn't take much to fix it.  Smiley
3855  Camaro Research Group Discussion / Maintenance / Re: Sputters and dies ! HELP on: February 28, 2006, 11:49:45 AM
The black plastic round choke housing where the wire connections are is adjustable; loosen the three screws that attach it and turn it a notch or two clockwise (rich) and try that; turning it clockwise increases the choke action (and fast idle rpm), and turning it the other way (lean) decreases it.
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