okay my 1992 Rs camaro 305 has been running hot latley so i went out and bought a new thermostat and it was still running hot so then my next thoughts were radiatior or water pump. but come to find out im getting compression in my cooling system most likely a cracked head or blown gasket. So if i have to dig into it i wanna go ahead and put heads cam.
I wanna go heads, cam (some kind of nitrous cam) and some good heads to go along with the deal. Im looking towards like a 100-125 shot, with some headers and exhaust. Im looking for a daily driver setup but more leaning towards power. I wanna keep the 305 so if anyone could help with any cheap heads or cam ideas, or anything it would be great. Thanks

Is this a 5 speed or automatic? If it is an automatic, don't forget to upgrade your torque converter if using NOS. You will need the anti-ballooning type.

5-speed, and is there any stock heads that will do better for my 305 such as vortec 305s, or 350 vortecs or any others

Casting 059 is the 305 head. You can also use the 062 350 head but they should be milled to keep your compression. The 062 has a bigger 1.94 intake valve. You will also need a vortec specific intake manifold and ecm tune.