GWW

I'm posting this here because I think I need to "tune" this out. After many months/years of checking everything including having my car in a shop for 3 weeks while they diagnose it. The conclusion is that everything is working fine. No vacuum leaks-smoke checked, no bad injectors-ohmed flow tested pattern tested pulse width too. Fuel pressure and flow is correct, BLMs are 128 at idle, coil voltage, spark, compression check, exhaust leaks, IAC, TPS, minimum air all check out and on and on are all good. I am confident that I am not trying to tune out a mechanical problem so here goes.

89 350 with 6E and AUJM chip.
My mods are Eldebrock base, AS&M runners, TPIS AFPR set at 47 lbs, Crane roller part # 104224 Intake 452 Exhaust 465, LSA 112, duration 214 intake 220 exhaust.

The problem is a 100 rpm or more idle surge and a rough warm up idle-sounds like it has 5 or 6 cylinders hitting until it warms up and then it's fine except for the surge. BLMs are good during this but the IAC is constantly trying to catch and correct the idle.

The mechanics consensus is that this mild cam is causing this and the stock chip can't deal with it, what do you think? The engine even before the cam never had a real smooth idle but the cam swap did make it worse. I had my own chip in it for a while and raising the idle, raising and smoothing the idle timing helps but it doesn't fix the rough warm up. Hate to admit it but I'm starting to think this car is not worth the effort, can't seem to fix this problem with 2 years of trying.
GW