Dis-regard the frame is it is not to "ford barn friendly".This is more in response to the exhaust question.I am also running Reds headers and opted to keep the exhaust 1 3/4 to the mufflers.I reduced the inlet and the outlet down to 1 3/4 on the mufflers and then welded flanges on them.The reason for welding the flanges was that I wanted to be able to remove the mufflers easily to install straight pipes if I wanted.I ran the tail pipes over the axle but didn't finish the outlet untill I put the body back on and can get the correct height that I want.Who knows I may never install the straight pipes but wanted to have that option