Well I bit into the after market 793880 kits off Amazon. Here is what I found so far.
Oil seal are OEM seals
Crankcase and rocker gaskets are good.
The problems arise with the camshaft themselves. The first two had oversize journal on the oil pump end and were .060" shorter than the OEM. The next one of three which install Saturday was journal wise but still .060 shorter than OEM. Another problem is with the oil pump shaft include in kits for it is .001 oversized and will not fit. I haven't check or tried the tappets but I suspect they will be a problem too. I also notice on the last camshaft the intake clearance at 1/4 pass TDC wasn't the same as when the exhaust valve is fully open. Well .001-.002 may not much but it was noticeable during adjustment.
So in retrospect it not worth the problems and I should go back to the OEM version which what I will after use up the three AM camshafts here.
Something else I have notice on the last three engines is the screw (bolt) in position 9 tends to strip out at the 220 in/lb (18.3 ft/lbs) torque level. But once Heli coiled they will go all the way to 21 ft/lbs although this way over spec'd torque in the first place but I was having a leakage in the area too on one engine. Finally went with RTV on both side of the pan gasket which resolve the leakage. The Heli coil was the 1.5 version or .469" of the 5/16-18 but I will change over to 16mm ones for the next time as the hole are deep enough for the longer coils.
Also we should be stocking at least one governor/oil slinger as I have seen two to taken out by the failed ACR parts this alone. Personally I got three on back order right now.