Cam bearing failures, let's finish this

[Jeepking1995]

There a few threads floating around about cam bearing failures in the i6, I've seen them fail in a fully stock rebuild all the way to a performance build, never heard of it on a factory built engine, something goes on when the engines are rebuilt, that on rare occasions will cause the cam bearings to squeeze on out like play dough, I've heard everything from cam walk, low quality bearings, insufficient oiling, too high spring pressure/cam lift, bore alignment, all the threads end with no definitive answer, i myself have had my bearings fail twice and have been doing a ton of research on the issue,for the sake of us jeep enthusiasts let's get to the bottom of this so nobody has to tear down a freshly built engine again

My stroker
Got a 98 4.0 with 170,000 miles from a guy that definitely beat on it, had a knock and needed an overhaul he said, so I bought it because I wanted to build my own performance jeep engine, took it apart Piston skirts were shattered on a few pistons, did a lot of research on parts and what to do to build a stroker before hand here's my original build
Forged pistons, 4.2 crank, 4.0 rods, bullet racing cam stage 3, 217/223, .484/.494 , spring rate 120/310, clevite coated cam bearings, slightly larger stainless steel Manley valves and harland sharp roller rockers, stock timing chain, running 10w-30 oil and a standard oil pump, ported the head and manifold, ran great for about 1 year and 10,000 miles
Until one day I heard a ticking noise, decided to drop the pan to inspect and found my cam bearings squeezed out, I thought I did something horrible wrong so I took it to a professional engine builder, he'd did absolutely nothing different after telling him my concerns, other than putting in a smaller lift cam and lower valve springs, wich is what i thought was the problem, dont know the cam or lift or duration, and a hv oil pump, along with other disappointing workmanship and customer service but he did have a good reputation but still was not impressed

7500 miles after that my oil pressure began to act funny, would drop and shake around sometimes, being an old jeep yj I wasn't terribly concerned but decided to take a look anyway, the cam bearings had squeezed out again, this is where I really decided to get into it, I called everyone that built 4.0s and engine shops in general, I decided to remove the spring bolt and install a solid pin, run high quality ACL bearings, had my new cam polished to allow .025 clearance, and run 20w-50 oil, was sure this would do it...
The new comp cam I installed is such poor quality that the distributor doesn't line up properly, the pin you place in the distributor to install it, it won't mesh with the cam because the gear on the cam is ground offset a few degrees, yes the cam is degreed properly, after 200 miles of driving I decided to remove the distributor in hopes of rotating that geat 180 to allow it to line up properly, it was only off by a degree or 2, but upon removing I found the distributor gear eaten up and the cam gear showed some damage too, turns out 20w-50 was too much for the oil pump to handle and it wore out the Gears, my oil gauge showed a drop of about 5psi, ( I idles ad 60 while warmed up) when reving, pretty sure the pump was cavitating

So where am I at now, I have a new gear coming for the distributor and have gone back to 10w-30 oil, once I install the gear I pray that the cam will not eat itself from the damage of a mistake that I shouldn't have made, but hey, I was following to professional jeep engine builders orders, I hope it doesn't fail but if it does I hope it lasts long enough to see if I have fixed the bearings issue, I want to here everyone's input on this subject, it's problem that shouldn't happen and has no clear solution, these engines have an amazing reputation for reliability and I know adding performance parts takes that away but we are smart enough to figure this out and help the next guy from going through this stressful and expensive problem