'63 valiant 4 door /6 cruiser questions.

I think I'm getting over my head so I'll slow down for now. Thank you Frank and everyone else for all their help. I know so little about the cam and whatnot ATM that I'm better holding off all the questions until I'm more serious about doing it. It runs good, it's not broken so I'm not going to fix it. I just wanted a little bit more out of the engine.

The head work however is a viable option to start now for a side project, when the head gets ported I ideally want it to match the gasket right?

My cam questions came from the springs for cam lift on the head work "72 Demon -P4286813 valve spring for .390/.450 lift camshaft 12 each or P4120249 valve spring for .430/500 lift camshaft 12 each." The engine was a rebuild that I bought from a reputable company 5-6 years ago and as such I have no idea whats going on with it. Which is why I'm here now and asking questions, in order to learn.

Again thank you everyone for your help and patience.
-Greg