I have a bell housing question. I have a 79 351w with a automatic behind it. Iam not sure which one it has? I also have a 390 with a 4speed behind it. Can i just bolt the 4 speed up to the 351 or is the bell housing different? Would i need to get a different bell housing. Will the same clutch work also since the 390 with 4 speedf has a brand new clutch?