What do i need to do when switching to 302 swirl port heads?

Hey, so i have a 74 roadrunner with a 318 in it. 650 cfm edelbrock carb, street master edelbrock intake, bigger than stock cam (i dont know the exact size) hedman headers to duals. Now i know that these 318s are known for their horrible compression so i want to get some casting #302 swirl port heads to up compression and hp. Is this worth doing? What all would i need to do?

I found a pair of these heads for $80 and id put 1.88/1.60 valves in it. can these valve go directly into it? what else would i need to change? With a thin .028" head gasket what could i expect for hp and torque gains?

Be easy on me, im only 17 haha Thanks for your help!
Author: 74Runneer