Newb Questions

I really haven’t been able to find a solid source for the swap all in one place. Can anyone recommend a site?

So I need a 360 magnum I plan on hopefully finding at a pull a part yard from a 92-03 Ram. Would the transmission with that engine I pull not work?

What years and models have the 727 that I could look at pulling? Or would it be best to find an individual transmission from Marketplace/Craigslist and get it rebuilt?

For the 8 3/4” rear, what models and years would I need for those? Looks like just A body Mopars with a V8? What is another good, more affordable source? I’ve been seeing those rears on eBay for $2k and up!