headers for big block A body

I ran the Hooker Fenderwells, got tired of the tires rubbing Bad. ran Proparts can ran warm ( headers and exhaust were the only change ) swapped on a set of Headman's the car picked up a little et ( don't rember exactly how much ) and the car ran cooler again. I never plugged the holes from the fenderwell headers. the Proparts I spent a Fortune on having coated inside and out ( I knew it was going to put the headers tighter to the engine and everything else. I like the fenderwells, plugs are easy, pulling the headers were easy. I like the way they look. only complaint was tire clearance and the master cylinder was close.