Everything from the flexplate back will work with the 350; the diesel 700R4 uses a different torque converter and governer, but can be used in a pinch. As long as you get your fuel tank drained pretty well, you can still use it, too. If you use the diesel radiator, you will need a flex upper hose to compensate for the difference in motor to radiator relationship. You can (obviously) swap in a gas motor radiator, but the trans cooler lines are on the driver's side, rather than the passenger in some applications, so watch out for that. The diesel wiring will be a bit longer, but all of the functional wiring will work the same (alternator, starter, pressure switches). All you will need to do to wire up the distributor is get an HEI pigtail and splice it onto the injector pump wire (switched 12v). If I can think of anything else, I will post up...that is all I can recall from my swaps right at the moment.