Sounds like with what you have, you have most of what you need to build it. A cam wont be expensive, just pick the right one.
A pontiac intake and quadrajet wont break the bank, but you will need to look around to find a deal. Edelbrock performer is a good alternative intake, but i would opt for a quadrajet to put on top. Easy to work on and reliable.
CC those heads, so you can determine compression.
Fact is stranger than Fiction