My problem is compression, this will be my first engine I'm building ...
My plan is to bore the block 60 over Use a 4.25 stroke crank & 6.8 rods I want zero deck the block the heads are 1970 Pontiac 16 short vavle but im changing that ,to 2.11 titanium intake 1.77 stainless exhaust with 1.65 roller rockers , the cam will be a custom grinded one in 600 lift range
The piston I was thinking was a dish with valve relief to lower compression maybe inverted dome but I fear that will cause more compression...any input on my build will be grateful.
Transmission will be a 4l80e Rear end will be a either 3.55, or 3.90 Car weighs 4000 pounds
If the trans is OD as i recall, at 3.55 you'll be about 2300-2500 rpms at highway cruise, with the 3.90s you'll be at almost 3k or so (depending on tire size, etc.)
If you go with a cam that has no soggy bottom end (hard to kill on a pontiac anyways) i personally feel you'll like the 3.55s with OD better. I ahd 3.42s and 3.90s and while the 3.90s woke up the first three gears, i wasn't having so much fun on the highway.