I'm putting a 555cu. in. big block in my 57 Chevy. Would perfer fenderwell headers for this application (2 3/8" primary with 4 1/2 " collector). Any input on your experience with this application or where I might find headers would be greaatly appreciated. I have a stock steering box in the car currently. Would settle for chassis headers if I can't find fender well set-up.