Streetmaster to Airgap

Hysteric said
You do realize that I based my opinion on what Modern says and so we have the same opinion but mines unqualified even though its the same as theirs. So if Moderns opinion is the head can support 500 HP do you or do you not agree with them?

Its a very simple answer Yes or NO?
Click to expand...
Many heads can support 500 hp.
I've taken a 273 head, stuck 1.88 in it and opened it up to near 230cfm.. the low lift number were crap like stock 360 smogers .
Theres no secret, just power left on the table for the money/time spent.