I have a SOHC in my ‘63 Galaxie, it pretty much dropped straight in. I had a set of Mad Dog 2” primary headers on the 406 in the car, I just modified these headers to suit the SOHC exhaust ports. Only other big job was to fit a radiator fill neck and cap to the radiator, as I didn’t use the expansion tank. Otherwise, it fit like it was meant to be there.