I just installed a set of 85003 3 days ago. I have a 1967 with 327cid 4 speed. I had to disconnect the motor mounts and Z bar to jack up the motor to clear the drivers side, and disconnect and remove the starter to clear the pass side. once they were in they cleared everything and look and sound great. I purchased mine in a set from summit that included the headers, thrush turbo mufflers and all exhaust pipe to dump in front of rear wheels. Only cost around $220, not a bad price for headers back duals. The worst part of the whole upgrade was removing the old exhaust. If you have any ??'s feel free to email me.
............. Dan
