I was having an issue tring to install the Patriot headers H8046-1 Clipsters in the 57. They did not want to clear the "A" arms or the P/S box, so I called PerTronix and talked to Paul (great help, nice fellow) I asked what was the combination that they used to build the headers. He asked if he could call me back, you know what? He did in about an hour. He gave me a list of the parts and the manufacture of each along with the part numbers. So I'll post them if anyone is interested.
S&P Billet Aluminum adaptor plate (or equivalent) no part number from S&P (80202032 D & P Classic) Raw no paint.
Frame mounts 3/4" ahead (D & P Classic 80202001)these are weld in only!
(D & P Classic 41002000) Urethane mounts.
Have not got the parts yet, but will you know if this take care of exhaust issues.
S&P Billet Aluminum adaptor plate (or equivalent) no part number from S&P (80202032 D & P Classic) Raw no paint.
Frame mounts 3/4" ahead (D & P Classic 80202001)these are weld in only!
(D & P Classic 41002000) Urethane mounts.
Have not got the parts yet, but will you know if this take care of exhaust issues.