Originally Posted by AndyF
Originally Posted by gremlinsteve
Gotcha. I’m currently with a set of 440 source stealth heads
So I’m only want to kinda Mimick the 612/644 build from above.
Or any other build that is similar.


440Source heads will limit you to the 500 or 550 hp range unless they are reworked by a pro.



what about victor standard port heads? What is their HP limit? I had mine just "cleaned up" and then flowed. they did 325 cfm @ .550 he didn't flow any more lift....