I needto measure up the port size of the head and then the opening of these headers. Will post the results here when i'm finished !
But i did ran it like this with the low compression and small roller cam and it did just fine i think, wasn't laying off anywhere in the powerband and spun very quickly and easily to 7000 rpm's
But i agree with you they might be bigger these headers. Maybe 1.3/4" headers should do the trick !