I have a 63 Impala 2 door that I am taking the 350 out of, and dropping in a built 5.3L. Does anyone know if there are GOOD long tube headers out there that I can order and bolt on that will fit, or if I'll have to just make my own? Thanks!
Normally I would recommend using the headers designed to fit a Chevelle, but with an X-frame car you have the frame coming in to form a pinch point at the end of the tranny. I would contact Holley as they also own FlowTech, and Fast Fuel, and sell a complete engine swap kit for a lot of Chevy vehicles from mounts, to wiring harnesses and motor mount adapters and tranny adapters.