408 stroker rpm questions

Ok I finally got logged back in and I have a 750 Holley I going to rebuild and the LD 340 intake has been ported and massaged already and I have a set of iron heads I want to port match. I don’t know what spring pressure I am running but I know it matches with the cam. The rods and crank are from scat with Keith black pistons. I am trying to stay low budget with this build thank you guys for your input this is my first built motor and needs improving obviously. I greatly appreciate your input.