Fuel pump timing set too high!?

[Jerred]

With interest in advancing my pump timing to 15.5 or 16degBTDC, I researched the procedure, obtained the parts/tools, got up the guts, and went for it.

I decided to first see where it was set at before adjusting. Using a dial indicator, I found that the plunger dept at TDC to be 5.57mm. I have a '96 with the 180hp fuel pump (CPL 2174). According to every chart that I've seen, 14deg on a CPL 2174 is 4.5mm. I had the valves set and fuel pump tuned by a Dodge dealer when I first bought the truck, 60,000 miles ago. The mechanic said he set the pump at 5.25mm which, HE SAID, was SLIGHTLY advanced from stock. WELL, after verifying the plunger depth to be 5.57mm, it appears that it is timed to about 19degBTDC.

It seems that the mechanic was reading the settings for the '96 truck with a MANUAL TRANSMISSION (CPL 2175), which many of you know has a 215hp fuel pump (my profile says manual transmission, but that's because I swapped them at about 150,000 miles, the truck still has the stock 180hp pump). 5.25mm, where he set the pump at, sits at about 14-14.5deg on the chart for CPL 2175 but if you extrapolate the setting out for the CPL 2174 (mine), 5.25 is 17.5-18deg (not sure why it was even higher than that when I checked it today).

Here's the question: since I've apparently, unknowingly, been running around at about 19deg on the pump timing (about 30,000miles stock and 30,000 miles with about 150hp increase from stock), what, if any, damage have I possibly done? Every since I added the extra hp, I've also noticed that the engine runs rough at high rpm/throttle/boost (2500rpm+/20-30lbs boost). Could this be a symptom of too high advance? I have a Banks fuel plate slid forward and what amounts to a 30lb wastegate and an extremely efficient intake and exhaust system.

Anyone have any thoughts? (besides me recalibrating that mechanic)