i think that the cut outs take out about a sq ft out of the inner fender. i belive the sub frame connectors and shock tower bracing will help. yet i'd like to know if any one has run the big block headers and survived??? :read2:
I ran the CPPA headers (semi fenderwell) with frame connectors on a 440, with 4 speed and the way my brother use to race the car it held together. He would hit the rev limiter and basically side step the clutch, input shaft broke the odd time so we went to an auto trans.