I installed a "bolt on" exhaust on my 66 coupe a few years ago. It was a real PITA job ! I was lucky because we have a lift at my work but it still took me 3 long evenings before I was satisfied. The biggest problem was the H-pipe hanging to low. It was hanging only 3 inches from the road. After lots of bending, fitting and re-fitting, pain in my back, bleeding knuckles, and a big wound on top of my head (it came in contact with the lift while picking up a wrench) the job was finally done.
Would I do it again : NO NO NO !!
Would I do it again : NO NO NO !!