The 462 is one of a line of engines called MEL. As I understand it, the early MEL engines used the same bellhousing pattern as the FE. Then there was a change in 62 or so, and some of the bolt holes didn't line up, but the missing bolt holes could be drilled. Then another change and the pattern was even less compatible.

I'm recalling this from memory. There's a MEL web site where you can learn more. If that were my engine, I'd find a 430 block that was compatible with the FE bellhousing, and use the 462 as a donor to build up the 430. FE flywheels fit the MEL.