340 horsepower rating

My buddies 70' E body picked up over a tenth and a mph doing this same swap. I believe the fenderwell's were 1 3/4" and the under chassis were 1 7/8".....iirc.

I can't speak to the exhaust, as they were open only on both setups. Also, the car had a 5.13 gear & 28" tires, so bottom end torque wasn't much of a issue.

My opinion is you'll lose nothing, and will probably gain some. Good luck, I love the old school style build. :thumleft: