i had no idea how hard it is to find a decent pontiac engine. the '70 455 ho was fried, bought a 76 that had been freshened that ended up having cracked heads and a block that i suspect is full of porosity.
long story short, i bought a 71 350 today. completely unassembled has been sitting for a couple of years.
the details are bored .40 over, 94 heads that appear to have had a valve job te same time the block was bored.
crank is 10/10 new pistons on stock rods, new power sealed cs-641 cam and lifters all in the box, new oil pump in the box, new timing set in the box, new bearings in the box.
i have a torker ii intake and a holley (probably 750) of of the 70. i also have the 64 heads from that engine that look pretty fresh (7/16 studs and roller rockers).
from the 76 i have a brand new lunati cam 07703 (too aggressive).
i want to combine what i've got for now and keep chasing a 400 or 455.
how much gain will i see by using the 64 heads vs the 94 heads? should gain c/r and between the roller rockers (i'll check but i'm betting they are 1.65's and the big valves i think the wimpy cam would be ok).
then add the torker ii and the holley along with ram air cast headers. i know there are some assumptions but if i'm right am i making 300 hp? 375+ pounds of torque?
i'm not planning on racing and the car will probably never see anything past 90 mph no matter what i put in it.
turbo 400 and i think 342 gears.
i've been so busy trying to get a running motor that i haven't really been looking that closely at some of what i have.
thanks for any input.