[COPO]

Joe,

Your thoughts seem to tie in with my earlier posts where I said 300+ non-Yenko iron block 427 COPO Camaros.

Also, Motion used to sell engines called "ZL-X" and I seem to remember they were 12:1 or higher L-72's and LS-6's with cast iron open chamber rec. port heads. There are a few articles on these in some of the old Hi-Perf. CARS Magazines from that era. The May '69 issue has an article on a 427 ZL-X w/12.8:1 compression and cast iron open chamber heads installed in a '69 BM Camaro.


[Edited by COPO (01-14-2002 at 04:21 PM).]