Originally Posted by blue04.5

Are you making a tractor pull truck? Losing torque down low is, like beauty, in the eye of the beer holder.
I have dual 3 inch pipes with an X-pipe on a little old 347 and I have no issues with bottom end torque.
What it boils down to is what do you want? An fe has more bottom end then my motor. There are a few articles and info on proper placement of a X-pipe, with enough digging can be found. It involves a crayon and trial and error to see where the crayon melts on the exhaust pipes.

Originally Posted by axelgawn

Hey I saw you had long tube headers in your signature, Are those the ones you used with your 347? I am looking for ones that will clear that block and a 4r70w transmission on my longbox.