What head gasket to use? Intake? Compression issues? Headers?
Your head issue, just use a GT40 or GT40p if you're on a budget. You'll be sorely disappointed with anything less.
If you have no plans for forced induction, a stock replacement gasket will be just fine. Any stock replacement gasket.
Intake must be for a 302. If you're running fuel injection, just use an Explorer intake, if running a carb, a cheap Edelbrock dual plan will be fine. The no name brand ones have a very tight elbow on the front. At least the early ones did.
No cylinder head in your budget will have compression issues
Headers are limited to stock junk or OBX (or Torque Monster).
If you don't have the money right now, you'll save yourself a lot of headache of doing it twice. Just save up for the parts you want so you don't have to dig into it again.