318 performance

I just picked up a 73 scamp with a smooth running 318 and a 3 speed auto, I'm looking to get some more power out of it for relativly cheap. I have around 1200$ to spend on this little project.

Some info on the car that I know so far:

Has an edelbrock carb of some type ( will find a part number)
Edelbrock performer intake

What I was told:
Mild cam of some sort
Higher compression somehow (didn't get specifics)

I'm not going to take the things I was told about this car seriously untill I tear into it and verify, now to start off I read the hotrod magazine build and have a few questions.

If my heads have infact been milled should I still look for a set of 302 heads? What can I find them in?

Where can I find a low budget set of headers?

What cam do you all suggest?

I'm also considering a gear, the car won't be daily driven and will see little to no highway time, it will see the strip on occasion, any gear suggestions?

Any input would be greatly appreciated.