few magnum questions before swap.

Will my converter on my la 360 work or not and how to tell. Also if I wanna keep serpentine setup how do I do so , like what alternator to use . Also what oil is there for this setup not sure if it's the same for magnum and la pan. Part numbers if u got them thanks. One more question how big of cam will the stock heads and Springs take. I got a low mileage engine and was just gonna swap it in without taking heads off