Auto or 4-speed? Either way, trans bell is different so you'll need to consider that as well (i.e. different tranny if auto or bell housing). Possibly different driveshaft depending on the above.

Might get away with the radiator you have depending on the build of the 383. Need to consider inlet and outlet of radiator and inlet to BB water pump.

Will have to lengthen the harness since the dizzy is in the front on a BB. Might need different torsion bars, suspension upgrades, etc. All depends on what you are doing with it.