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I have seen a worse case one time in this forum with an aftermarket cam and high tension springs.
__________________ RED 2002 SS (no T-tops), m6, 224/228 112 lsa 108cl 570/560 lift (373hp/366.8tq), Compcams 915 valve springs, ASP pulley, SLP headers/cats/Ypipe and 1998 OEM WS6/SS Single Outlet Exhaust, 3.73 ring and pinion, Lou's shortstick with SLP short throw shifter, SLP ram air kit, SLP Spring and Shock package, SLP Shck Tower Brace, SLP Torque Arm.
Mileage on the engine is 48,000. The stock cam has about 35,000 miles (previous owner had a TR224 cam in it for a while). It does have isky 295 springs, which are pretty stiff. I think it's lack of oil. The previous owner said one time after a dyno run the oil pressure dropped to basically 0. He shut her off right away, but I think thats what caused this cam issue (and probably my cylinder scuffing ).
Anyway, a new ported oil pump is going in with the new cam and lifters.
__________________ 2000 Navy Blue Metallic WS6 Trans Am - 6 speed
Ive seen a few other cases of this on the forum, but I dont recall any resolution as to how it actually happened. It looks very similar to the spalling on my rear axles when i changed my wheelbearings. My axle was never without oil, I figured the spalling may have been caused by small filings floating around after installing my 4.10s. In your case, maybe theres something floating arund your engine... might want to inspect your oil filter and check for filings.