1861
Decoding/Numbers / Re: DZ Engine Pad Stamp
« on: June 10, 2015, 08:46:01 PM »
In my opinion it is real. It compares favorably with other DZ stamps in that time frame.
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1862
General Discussion / Re: zl1 motor
« on: June 10, 2015, 05:13:13 PM »
Chevrolet did a number of aluminum BB castings back in the day; not all were ZL1s. If it has provision for a mechanical fuel pump it is likely a ZL1. However they did some castings in the '80s in a much darker alloy.
Get the casting number off the back of the block, the casting date near the LH motor mount tabs. Also check the pad on the pass side of the block deck for a stamping. ZL1 blocks can have numerous problems so be careful.
Get the casting number off the back of the block, the casting date near the LH motor mount tabs. Also check the pad on the pass side of the block deck for a stamping. ZL1 blocks can have numerous problems so be careful.
1863
General Discussion / Re: '69 original paint Z...leave as-is or repaint?
« on: June 08, 2015, 01:55:08 AM »
Judging by the other photos of it much if not all of the nose had already been poorly repainted. I would strip and repaint the car without hesitation.
1864
Originality / Re: Chrome late 69Z tailpipes
« on: June 03, 2015, 01:31:59 AM »
You're probably right. A few new ones every month.
Reminds me of the Blockbuster free video coupon deal of many years ago. They redeemed more than they printed.
Reminds me of the Blockbuster free video coupon deal of many years ago. They redeemed more than they printed.
1865
Originality / Re: Chrome late 69Z tailpipes
« on: June 02, 2015, 11:10:53 PM »
There were approximately 65,000 1969 Camaros built after May 19, 1969. Assuming normal distribution that's about 5,400 Z/28s and 9,000 Camaro SS built with chrome tailpipes. They were serviced well into the '80s and are reproduced.
1866
Decoding/Numbers / Re: 69 Camaro with 11A build, ....yet has X11 code on cowl tag ?
« on: June 02, 2015, 12:04:49 AM »
Due to the delay in the 1970 Camaro launch 1969 production continued through the 1st week of November 1969.
1867
Originality / Re: 1969 Z28 Exhaust Beginning of Resonator's
« on: June 01, 2015, 07:51:21 PM »
ZL1 #59 N642876 was ordered with NC8. Final assembled on or about May 13, 1969.
1868
Originality / Re: 1969 Z28 Exhaust Beginning of Resonator's
« on: June 01, 2015, 04:39:40 PM »Just an FYI, but a July built L78 Chevelle survivor has been documented (build sheet), with chambered. Although this is not a camaro, chambered exhaust on the chevelle was still used after May 69.
The May 6, 1969 letter announcing chromed tailpipes and the discontinuation of NC8 is specific to Camaro.
This may be a good time to clear up decades of confusion about how the chambered recall affected L34 & L78 production. As of the initial recall in November 1968 those vehicles were built with the standard N10 resonator/muffler system. The interim system w/o resonators was Z/28 specific and prompted the second recall. Undercarriage photos of ZL1 #3 N608193 when new show it was built with the standard N10 system.
1869
Originality / Re: 1969 Z28 Exhaust Beginning of Resonator's
« on: June 01, 2015, 03:16:11 PM »
Chambered was discontinued as an option on May 19, 1969 same day chromed tailpipes entered production. So the same VINs may apply; last NC8 cars were prior to N646229/L530160. Vehicle orders still in process were built with the standard N10 system.
GMPD continued to service NC8 for several years. I bought a complete system at a dealer in 1976.
GMPD continued to service NC8 for several years. I bought a complete system at a dealer in 1976.
1870
Originality / Re: 1969 Z28 Exhaust Beginning of Resonator's
« on: June 01, 2015, 12:38:31 PM »
Exhaust is only specified on the CBC and those are very tough to come by. Typically they were in the car as delivered to the dealer and discarded; some dealers put them in the folder with other paperwork. I have a few copies; our db just lists it if it was present. The latest FM example I have is 2nd week of April at Van Nuys so I believe you are correct about FQ indicating resonators. I expect the change was simultaneous at both plants.
Chevy was vague about the date for the transition to the resonator system because it did not involve a price change. They likely used up remaining stock, then changed over. The change to chrome tail pipes had to be coordinated with pricing. I'll bet Production Control people were on the line days prior, removing the standard tailpipe systems.
I'm sure there are a few survivors around with OE resonator systems; just don't happen to know of any. Exhaust in those days didn't last more than a few years.
Chevy was vague about the date for the transition to the resonator system because it did not involve a price change. They likely used up remaining stock, then changed over. The change to chrome tail pipes had to be coordinated with pricing. I'll bet Production Control people were on the line days prior, removing the standard tailpipe systems.
I'm sure there are a few survivors around with OE resonator systems; just don't happen to know of any. Exhaust in those days didn't last more than a few years.
1871
Originality / Re: 103 research octane sticker ZL-1
« on: June 01, 2015, 12:07:12 PM »
ZL1 Camaros did not use the fuel warning label as did L88/ZL1 Corvettes. Those engines were Corvette options anyone could order and perhaps a bit more thought went into it. COPO builds were typically customer-specific.
1872
Originality / Re: 1969 Z28 Exhaust Beginning of Resonator's
« on: May 31, 2015, 05:53:31 PM »
The CTSB I have states the new Z/28 system will be effective in production approximately April 15, 1969. With the 2nd recall, the Z/28 system was now the same one used for the L48 300/350. Parts were already there; just a matter of having adequate supply. There is no mention of a price increase for the new system. When chromed tailpipes became standard May 19, 1969 N10, SS and Z/28 pricing increased $15.80. The earliest FQ system I have is 05C; take that with a grain of salt. Not nearly enough data.
If you're looking for approximate VINs I'd estimate N627600/L52900 for the resonator system; N646229/L530160 for chrome tail pipes. The few remaining OE production chrome tail pipe systems still in existence show an interesting difference. The RH tail pipe was the new design 2-pc chromed version, welded to the muffler. However the LH tailpipe was the standard part polished and flash-chromed. This was used at least through September 1969. I have had several NOS service chrome tailpipe pair and both pipes were 2-pc.
If you're looking for approximate VINs I'd estimate N627600/L52900 for the resonator system; N646229/L530160 for chrome tail pipes. The few remaining OE production chrome tail pipe systems still in existence show an interesting difference. The RH tail pipe was the new design 2-pc chromed version, welded to the muffler. However the LH tailpipe was the standard part polished and flash-chromed. This was used at least through September 1969. I have had several NOS service chrome tailpipe pair and both pipes were 2-pc.
1873
General Discussion / Re: Caveat Emptor..another
« on: May 28, 2015, 02:21:00 AM »
From about 01B to 02D both were used in production; '69s may have initially been allocated to Z11s.
1874
General Discussion / Re: Caveat Emptor..another
« on: May 27, 2015, 07:14:38 PM »
I believe it is. Just belongs somewhere else.
1875
General Discussion / Caveat Emptor..another
« on: May 27, 2015, 04:48:41 PM »
http://www.ebay.com/itm/Chevrolet-Camaro-Z-28-/231575465127?forcerrptr=true&hash=item35eaf92ca7&item=231575465127
Ad states "Also want to add that this is one of those rare Camaros in 69 that vin was slightly off from tag as far as Camaros were concerned because they had problems with the following year production, just adds a little more history behind this gem."
Sure. 02D tag; VIN is N620236. More than "slightly off."
Ad states "Also want to add that this is one of those rare Camaros in 69 that vin was slightly off from tag as far as Camaros were concerned because they had problems with the following year production, just adds a little more history behind this gem."
Sure. 02D tag; VIN is N620236. More than "slightly off."