First Engine Build - Advice Needed

First thing I would ask is why you're doing it yourself. If you're doing it because you want to do it yourself, that's good and more power to you. There's lots of help here. If you're doing it yourself to save money, you won't save much.
Agreement here... Disassemble, and count your bucks..A,low compression 440 out of a motorhome might shock you,(YouTube Roadkill 440Charger,AND Crop Duster..never had more than 8 to 1. ) Let's start there...