Engine swap questions

I have a '82 Olds 98 great condition all brake components new interior excellent. Unfortunantly the engine is starting to rod knock and is on its last leg. I have a SB chevy engine and 350 (short/long tail) and 400 tranny. I know the BOP tranny won't bolt up. I would like to know what else will not match up. Yoke? Motor mounts? Tranny mount? Accy's bolted on to original engine will not fit? Thank you in advance.

need different motor mounts i think, driveshaft most likely a 350 trans will fit the crossmember for sure the 400 you might have to move a bit