318 engine swap

if i take a 318 engine out of a 1984 dodge d150 with an automatic transmission, and put it in a 1984 doge d150 with a 318 motor but a manual transmission, will i have to make any modifications to either engine?

Just switching the flywheel and getting a pilot bearing, you wont be using the kickdown linkage on the carb, other than that, shouldnt be any difference.