big block combo

[375instroke]

I'd use HP manifolds before I use shorty headers.  The shorties don't flow any better.  The length of a headers contributes greatly to their efficiency, not just their tube diameter.  You're exhaust valve and port are the real bottlenecks.

[dukeboy_318]

im going to end up stroking this motor and running flowtech headers, seem to be a decent choice based on flow and price