How far to go 383

I'd blow out the water jackets, and pull the intake. The lower end is fine. Squirt some Marvel mystery oil or ATF into the bores and turn it over a few times. Pull the intake and valley pan and pull the rockers & shafts. Pull the lifters and lube with Crane Cam's moly paste. Add assembly lube to the tips of the pushrods and rockers. Preoil it and verify oil flow up to the rockers. Then preoil it again with a primer in the car, and start it.