Advancing stock cam in a 360?

The 360 in my D200 has always run a bit funny, kinda rough idle and harder to start than it should be along with garbage fuel economy. I finally checked the slop in the timing chain by barring the engine back and forth and there is at least 8 degrees of slack so I'm going to put in a fresh timing set. I ordered a Cloyes Street Billet True Roller set that can advance or retard in 2-degree increments. I'm thinking of advancing the cam 2 degrees, any thoughts? Maybe better to install straight-up, or advance it more (4 degrees)? It's a stock 1972 360 2-bbl cam.

Rest of the combo: refreshed stock heads, long tube headers, 2 1/4” true dual exhaust, Performer intake and AVS2 carb, upgraded ignition (CD box, Summit billet distributor). 727 trans, full-floating D60 rear end with 3.54 gears, 33" tires. It's just a cruiser and occasional hauler/tow rig, thought about upgrading the cam but with all the issues with junk lifters these days and the hassle of changing valve springs I decided to leave it alone.