383 Rev Limit question

I have a 383 with a few addons and want to know where it sould be reved to. This is my first Big Block and First Mopar.

The engine has a .509 purple shaft hyd cam, with matching lifters, 915 heads stock (i believe), MSD Ignition 6a, Pro Billet Distributor, Team G Intake, 850 Demon carb, Unknow pistons (will find out when I pull the heads), or current compression, previous owner only ran 111 octane so I believe it has a rather high cr.

Next question, with head work what where should it be revved too.

Head work would connsist of new springs (what would be reccomended), 1.6 Roller rockers, I would like to have it machined for larger valves i believe I have the 1.60 exh valves and would like to increase to 1.80, the intake valves are 2.08 how much larger should I go if I go to 1.8 exh. I dont think I will have the money for a port or polish. If so I would just by a pair of edy's.

Thanks for the help as I said this is my first time with Mopar and a Big Block. Right now it runs strong and sounds great. If you need additional info ask and if i know i will answer. Also i think the exhaust migh be a little small it a true dual with a cross over flowmaster delta flow mufflers but only 2.5 inches. I thought it should of been 3".