$50 Craigslist 360 EXTREME budget rebuild??

I am going to do the same thing for a roller challenger I bought a few weeks ago.
I have an old 318 out of my truck, dingle ball hone the cylinders, hand lap the valves, hand polish the crank, new bearings, cheap summit cam, new valve springs and oil pump.
I think I can throw it together for under $500 and have a decent running car.
To ease the budget pain, I have an LD4B intake, 3310 holley, new timing set, and a new set of car headers that have no home, this project will be to dry up some of the unused parts I have laying around.