383 power upgrade help

Okay so are you suggesting going for some aluminum heads? And based on all my now known knowledge I can't just throw the heads right on I have to get them checked? Some of this confuses me of course so I'm not trying to be real hard to work with it isn't my goal to annoy all of you I really appreciate the help wish I had someone in my family that knew stuff
Do ether or….

Run the stock head with a valve spring swap

Or

Grab a set of ether Stealth or Edelbrock heads and run them.
Check your own head by filling the ports with alcohol and see if the fluid level goes down in and past the chamber. If it leaks, machinist. If the don’t leak, run’em.