I don't know why you'd want to do this considering that there is no benefit to doing it, but who am I to question someone for what they do?
As far as fitting, it is the same as a 5.0,
but......
The early engine will not be set up for a roller cam typical of what you'd see in a later 5.0. You will have to use a retro fit roller lifter to use a later model hydraulic roller in the engine. The distributor that comes in that engine will need to have the distributor gear changed to one compatible w/ that cam.
The timing cover will have a dipstick in it as early 302's came w/ front sump pans. So conversely, you'll have to block that, and acquire a double sump pan,dipstick, oil pump, and pickup tube.
Early 302's did not use the same ductile iron content as the later blocks do, so if you are planning on keeping it forever, it will wear faster (cylinder wall) than the venerable 5.0.
Early 302's were 28oz imbalance engines, 5.0's are 50 oz imbalance engines. You'll need the flywheel/flexplate that goes with the engine as well.