I have a set in my 69 Dart with 440. I had to cut them apart and reposition a bunch of tubes so I could turn my front tires or they would rub the header tubes. I can now turn the steering wheel lock to lock without any contact.
Even after all that work, I would do it again in a minute. Fenderwell headers are freakin COOL looking!
Currently they're black, but I might paint them white for that late 60's/early 70's look.
George
