Slant 6 to 340 swap

I thought his topic would have been done to death, but I can't find a thread about it.

What would need to be changed to convert an original slant 6 car to small-block V8? Motor mounts, transmission, rear end, front springs, radiator?

The reason I'm asking is, all along I figured I'd buy either an original V8 car or one that has already had the swap done. But I'm seeing some affordable /6 cars and wondered if it wouldn't be more cost effective to get one and do the conversion myself.

Thanks!