Quote:
Originally Posted by wildpaws
So all of the first gen. Yenko Camaros and ZL1s with COPO 9737 had 15" wheels instead of 14"?? To the best of my knowledge (and I'm no expert on COPO, Yenko, etc.), all Camaros including the SS got 14"wheels, SS Camaros came with F70x14 tires on 7" wide rims, first gen. Z/28s came with E70x15 tires on 6" wide rims. I thought Yenko ran Pontiac Rally II wheels. FYI, both SS Camaros and Z/28s had the Chevy Rally wheels (silver slotted wheel with a chrome beauty ring on the outside and a chrome w/black trim center ring, the difference was the SS got 14" Rally wheels, the Z/28 got 15" Rally wheels.
I'd love to see some reference information to verify your suppositions, if I'm wrong I want to be able to document the differences for when it comes up in the future. And I'd like to see that for the suspension as well as the wheels.
Clyde
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The '67 & '68 Z's used the 15x6, but in '69 the Z's went to a 15x7...which meant the COPO 9737 cars of '69 got the 15x7 rallys...but the COPO 9737 package didn't include wheels in '68.
Quote:
Originally Posted by wildpaws
Doing a little research, I see the '69 Yenko is shown with 15x7 Chevy Rally wheels (probably due to Yenko ordering COPO 9561 when it became available from Jan. '69 on), not the Z/28 15x6. I'll have to look further on the suspension, the package (COPO 9737) you mentioned was mostly about the wheels, disc brakes, 13/16" front sway bar, HD posi 4.10 rear, 140MPH speedo. It also looks like Yenko did use the Pontiac Rallye II wheels in '67/'68 and perhaps early '69, in Jan. '69 Yenko started using COPO 9561 Camaros directly from Chevy that Yenko then added Yenko stripes, Yenko emblems, etc. Prior to COPO 9561 in Jan. 1969, Yenko ordered SS 396 Camaros and swapped out the engines at Yenko in 1967, 1968 Yenkos used a COPO 427 (different than the COPO 9561), that was also likely used in early '69 Yenkos.
Clyde
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Yenko didn't just *order* the 9561 package, he petitioned Chevrolet to build it, based on positive reaction he'd gotten to the 427 cars he had built in '67 & '68...the fact that other dealers became privvy to the 427 Camaros & Chevelles in '69 was a mistake, as Yenko had full intentions of being the only dealer to take advantage of the special 427 exception. Yenko also developed the COPO 9737 package, which debuted on the '68 Yenko Camaros...Chevrolet referenced COPO 9737 by calling it the "Sports Car Conversion - Yenko"...you have to remember, Yenko was a road racer, not a drag racers, so his vision was of a big block that handled like the Z/28. He didn't have to convert any cars in '69, as he had already talked Chevrolet into doing the heavy lifting for him by installing the 427s & handling/suspension package...and disc brakes were mandated in any big block Camaro in '69, so they weren't part of the COPO 9737 package.