I am not sure if I am in the right Forum.

I do not know that much about engines. I will be learning! Best way to learn is to jump in. I have always wanted to get an engine, tear it down and rebuild the entire thing and run it on an engine stand. Well, yesterday, I found a Small Block Chevy 350. I was told it came from a boat. I also have the Mercruiser water jackets which I do not need. Last night, I was ale to do some research on it according to the stamped numbers. This is what I found:
4GM57LG General Motors 5.7L (not sure what the 4 or the G is)
D058 tells me April 5,1988
140936380 tells me 1987 - 1995, 350 car/truck 2/4 bolt main (mine is a 2) passenger stick, 1 piece seal, roller/flat tappet cam
V0407PJC tells me V=Flint Michigan, 04= April, 07=7th, PJC=1988 CI 350, HP195 equipment Manual Trans, Throttle Body Injection truck

It was free. It is missing the intake manifold, carb, distributor, cam, lifters, pushrods, valve covers, 2 pistons, oil pan, and probably some other stuff.
My question: How do I know what parts are the correct part when ordering? Example: the intake manifold, if it is made for a 350. are they all pretty much the same? Do they have different angles? Another Example: Cam, I see I can buy the cam kit with the lifters, timing chain, pulleys, etc., Specs above say I can use roller or flat, How do I know which one to get? Are lifters all the same or are there different heights which would affect push rods, etc.

The plan for this engine is to rebuild and run on a stand, not in an actual vehicle. I have a few Hit N Miss engines that I take to shows.

I will be getting a book to help guide me through the process. I will need a lot of help.
All help is greatly appreciated.
Thank you.