Scat Crank Repair

Long story short put motor in car drove 300 miles and rear main started leaking pulled pan seen metal and found thrust bearing ate up, So I pulled motor rebuild again with new scat crank,while I was waiting on the motor I did some research on the cause and found cooler circuit restriction could be the cause. I found that the -6 to 1/8"NPT fitting I used in the trans had only a 3/16" opening so I was told that is most likely my issue. I tore the tranny down checked stator bushing made sure that it did not spin and cover cooler circuit hole in the pump and I drilled and tapped the cooler holes out to 1/4" NPT with -8 fittings and lines to cooler. OK got motor back and wondering about my Hughes off the shelf converter I ordered a FTI converter put everything back to gether drove it 100 miles and it's done it again......!

I just did some more measuring and found that the FTI converter pilot stout is .075" taller than a stock are my Hughes converter and I it looks like it bottomed out in the crank shaft so the cooler fitting might have fixed it but I created another problem with the FTI converter. I have measured the scat crank and compared it to a stock crank and they are the same so I'm at a loss right now.