LA 360 Engine refresh?

I have ‘73 Dart Sport with an LA 360/904 that was built by someone 15 years ago and I don’t know anything about the specifics of the build, but here’s what I do know. It has a 360 block casting number 4006830-360-9, 3769974 head – 1975-1976 1.88/1.60 valves, Mancini Racing Adjustable Rocker Arm Set, 904 transmission, TTI headers, an Edlebrock Performer 318/360 intake manifold, a 9635 625 CFM Carter AFB competition series 4 barrel carb, MSD ignition and digital 6a ignition Blaster 2 coil and distributor, rebuilt 60A Alternator, a 26 inch radiator. Not installed, but already purchased... 8 3/4 rear with 489 case helical sure grip with 3.23 gears, ESPO 6 leaf springs with new shackles and bushings, Hotchkis front sway bar and a front end rebuild kit from Mancini.

What I’m mostly looking to do is clean up the engine, replace gaskets, check for any foulness and improve compression a bit if I can. I know there’s a long list of things I can replace while I’m at it, but there’s only 29k on the engine, so I’m hoping for good luck when I open it up. My first and only thought was too port the heads and possibly the intake manifold for a performance upgrade and possibly replace the Carburetor(looks as well for the carb). It was suggested that I buy cheaper Summit Heads though. I’d go that route if I can find a pair for cheap. I’m not looking for crazy horse power, but more is better. If I clean up and sell my current heads will it be similar in cost to buying “cheaper” heads after you factor in the machining costs? I’m uncertain as to what Cam I currently have as well. Thank in advance for any insight or suggestions!