[project89]

ok heres the deal i got my new heads and they were supposed to be gen3's with D port ex ports and a slightly larger valve.but they turned out to be gen 2 heads with a round ex port and a .040 smaller intake valve.

was a lil pissed till i looked up the flow numbers.the gen 3 heads avg around 20 cfm more then the gen 2's on the intake,but they lose 6-10 cfm on the ex side.
so now i have no idea which heads i want to run

heres some flow sheets(granted these wont mean **** once there ported but this gives u an idea of what they flow stock)
stock iron heads

gen2 aluminum heads

and gen 3 aluminum

now should i go for max flow with the gen 3's or use the better flowing at low lift gen 2's