Yenko paperwork for creating the COPO option?

[Jeff H]

Yeah, that might be the paperwork I was thinking of. Didn't it show the emission's certification that GM had to get to release it as an option package? I was also under the impression that Don's reasoning for asking for that engine option was to make swapping the 427 even easier since the carb was really set up for the 427 and not the 396. It's hard to remember what you're read in the past regarding these things Don was doing with GM.