hey guys, my name is sean and i currently build a 383 it had procomp heads 3003 with 210 intake ports. 160 exhaust.
when i launch my car it has skinny tires but it pulls kinda good till maybe 3500
then 3500 to 5000 seems to lack a lot of power. i have a procomp intake manifold with a holley 670 dual feed carb on it. so my thinking is that the manifold isnt matching up the 210 intake ports like maybe half? would a holley stealth ram match up better does anyone have this combo. would i get a lot more power and top end.
the cam is a 234 244 duration 488 510 lift kinda lopey but nothing serious says power band is from 3 to 6000

another thing is my dad whos been rebuilding 700r4s all his life just rebuilt mine i put a 2500 stall in it and it doesnt stall its like its stock and it shifts really early and i got the tv cable bracket thing with the spring. could it be the valve body he didnt really go into that .
my main thing is the engine seems like it should have a hell of a lot more power