<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR> b-man, you're the best! <HR></BLOCKQUOTE>
I used the Summit 2800 cam in a low-compression 400 that was installed in a '69 Grand Prix. The '69 400 was still standard-bore, it was freshened with new rings and bearings and I installed a pair of stock 6X-4 350 heads. The engine ran good on 87 octane fuel.
Ran a stock '72 intake/Q-jet and stock log exhaust manifolds with a 2-1/2" dual exhaust. The car was fully-optioned (heavy!) and had a TH400 and 3.23 gear. Took it to my local high-desert track (2800 ft. altitude) and ran 15.58@91 MPH, probably could have squeaked into the high-14s at sea level in good weather. Not bad for what was once 'Grandpa's Grand Prix'.
The 066 cam actually came stock in the '69 GP 400 automatic cars. The 066 is a pretty good bet in a '66 Cat with I'm guessing taller rear gearing than the 3.23 in the GP, but the 2800 would be good as well. The 068 or 2801 would be too much cam in my opinion, the low-compression 400 probably wouldn't like it much on the low-end in a heavy car with highway gearing.
