looks like that port middle/center header runs right into the intake/flame arrestor? tight squeeze.

About 8 inches of room should be good. If I have to Mike will whip something up on the cnc. He's built everything else custom might as well do the flame arrestors too.
Definitely won't be a problem with the Whipple's

Ready to go to CMI

Nice!!

Wait! Did you dyno?

Ran out of time had a hard date at CMI, will pull engines and dyno when we get back.