I am far from pro - but I like working on poncho motors and I like getting a good result.
I always do the tilt test and I bought a chinese engine test stand to run the motor out of the car. If you try to do it fast or take shortcuts, you usually pay. I had a 455 from a TA that kept leaking (I pulled it to fix the rear main leak in the first place). I finally had to use the best graphite rope seal to get it to work because I couldn't get Wade's seal to work in that motor. I've used both seal's - and prefer Wade's seal. In this case I had to use the graphite and it is still very dry.
I've not been able to replace any rear seal with just lifting the crank "a little".
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