motor swapping, advice please

i have a 72 duster, 318 with a 3 speed standard, i have a 360 thats going in soon and a 4 speed sometime this year, would rather wait til the 3 speed goes out lol but my problem is, i know on an automatic when youre swapping from a 318 to 360 you just change the torque converter due to the whole internally/externally balanced deal, but what about on my manual trans? i have no clue what needs to be changed, help please!