sbc heads
I have a street s-10. 383 stroker, with 700r4 and 342 gears. hyd roller with about 560 lift and 230 strraight across at 50. lsa is 110. I have a set of performer rpm 170 heads and matching intake, with a 750 holly. msd dist. Are these heads flowing enough air? I shift at around 6000 which seems to be the limit for power. My track is at 5500 feet and the air is generally around 7000. My machinist tells me that these heads flow about like the vortecs and probably are holding me up.???