My 340 in my 66 developed issues :-(

The only issue is, is if you want the down pipe on the left done right, you have to have a custom exhaust shop do it. They had to squeeze in a 2-1/4 pipe between the torsion bar and frame. They also had to weld the flange on once the pipe was in...meaning the pipe will not come back out that way. I went with all stainless too.

So both my down pipes are 2-1/4 stainless. I had them weld in a bung for O2 sensor tuning later on