the 360 will need a bigger radiator. the left motor mount is different. i think on some the flex plate plate is different, has to do with the engine balance. but check the block, heads, crank for cracks before spending money. money to money ill bet the heads are cracked. the left motor mount on the 360 and 340 is different from the 318 cause the factory didnt want you mixing and matching engines the tranys not made for the HP of the 360, 340. beleave it or not the factory does have a GOOD reason fore making things the way they do.