Lots of good information given, and of first importance, welcome! I think that you'll be surprised to find that by the time you buy the special tools that you need to complete the build , and then pay retail prices on all of the pieces and parts that you have to have, your out of pocket cost is going to be approaching the cost of a complete engine that comes essentially ready to go, but also has a warranty along with it. I think it would be a fun project to build an engine from scratch, but I don't see it as a way to save a bunch of money. Just my $0.02, and you may want the experience.