If you're still looking for guidance on titling and registration, you should take a very close look at the following link. Buying a complete car with out a title can be a major risk. You should be sure you can obtain a title before you drop a lot of money on a build. My impression is that you will likely have to title/register it as an "assembled vehicle," since you're using a different engine, frame, trans and differential. Also, from scanning the information, you need to save your receipts. It would also be smart to check with some local Michiganders for their experiences.

http://www.bipac.net/semaga/TagTitleToolbox_MI.pdf

Then, pull any recommended forms the site mentions and see what information is needed.