Looking for more HP from a 360

I think as far as power goes, like OU said you need to upgrade the headers or concentrate on getting more basic stuff and a better cam. Your current compression is low at around 9.4 and the cam is large duration and single pattern which is not helping witht he head port and header combo you have. Add static ratio and get a cam with less overlap that closes the exh valve earlier. If it was me, I'd run the Edelbrock RPMs with the chamber reduced to 58ccs and replace the cam with something like the XE284H or the Lunati 60404.