slant6 to 318 c.i. small block (similar in size to 273 c.i.). will my A904 trans..

Just did a similar swap last few days ago, still in the process of buttoning things up but just get a later 904 for small block as stated, drive shaft tho if it's the old trunion style you'd have to change out the driveshaft to a later one that's the correct length to connect to the later slip yoke style, unless there's an adapter that I don't know about that can reuse that old type of driveshaft. I still need to do that and I was able to reuse the Trany mount from the slant 6.