Depends on what heads you have, if they will fit decent. If you have a raised exhaust port, not sure they will fit. I have those headers on a 71 Demon, 440 with Indy EZ1 heads. they fit pretty good, although I had to ding #6 for plug wire access and changing the plug. I had them, so I used them. Other than that, they fit pretty good. Mine are 2"