Re: how much compression did I lose with a flat piston ?
Maybe 30/50hp(??) off the top of my head.
Remember the 300hp/327 ran medium valve heads, close to 10 to 1 CR. flat-tops and the old -929 cam whereas the 350hp and 325hp/327 engine ran 11 to 1 domed pistons, big valve heads and the -151 cam.
Ain't NO diff between a 325 and a 350hp/327 except for the carb and intake! the 350hp ran a stock aluminum high-rise like the old Holley 300-36 and a 585 cfm Holley carb and the 325hp ran a 750 Q-Jet on a Q-Jet cast-iron intake is all!
IF I have my carb's right?..................
Way back then, I didn't know this b/c I REALLY wanted a '66 Duece Coupe w/ the 350hp/327, 4-speed, 3.73 posi- but I was too late in ordering it due to gathering up the down payment money!
So I bought my '67 350SS/RS Camaro in Oct. '66 instead not knowing that the '67, 325hp/327 Duece was still the old L-79 engine w/ a Q-Jet on it!
Or I would have bought '67 Duece instead!
PS., oh, and btw, the 300hp/327 ran an AFB on a cast-iron intake that is I figure is the best cast-iron intake made back then up until the GM made the cast-iron marine engine copy of the Z-28/300-36 Holley dual plane!
I have one up on the shelf out in my garage!
Last edited by pdq67; Mar 22nd, 08 at 10:30 PM.