I have a 69 bird that has a tired 73 400 connected to a stock 4 speed. I was planning on swapping to a Chevy 355 or 383 and was wondering what I would need to complete this. My 4 speed is the correct one for the car. So far from trying to search I think I will need -BOP motor adapter -Chevy Motor Mounts
But I am sure there is something’s I am missing so any help would be appreciated