What's better: Schumacher A body conversion mounts on a small block k frame or original big block A body k frame?

My small block k frame is damaged, so I'd have to get that repaired anyway along with modifying it so it'll work with the schumachers. BUT my other option is a guy wants to sell me an original A body BB k frame for $250. I'd still need to buy mounts for it though. And I also heard that the original style mounts will only bolt into certain engines.

Trying to decide which would be less of a headache and better in the long run. Thanks