Hello, I have a 331 caddy motor with 390 heads. I've placing it back in the 55 caddy but I cannot use the 390 exhaust manifolds. Drivers side hits the steering box, passenger side hits the "a" arm bolts, because of the generator bracket. I don't want to use the 331 manifolds as they are restrictive and the gaskets will not seal the ports properly. I'm thinking to purchase the Sanderson Headers, c-391. I don't know if they will work so I am wondering if anyone else has done this mod to the 331 motor and what did they use for the exhaust manifolds? I know I will have to make a generator bracket for these. Any ides would be great. Thanks, George.