$50 Craigslist 360 EXTREME budget rebuild??

need a little help. I'm looking to swap my slant 6 motor with possibly a 360. I'm also looking at buying a new rear end. I have never dealt with buying rear ends and need help with pricing the of it. He is selling a 8 3/4 with 410 gears, 42 case. Green bearing. I what to be able to treat the car rough and hold up.
Welcome to the site.
Okay... Start another topic for yourself and ask for help. This topic is about J Par and his quest to build power on a Harbor Freight budget.