I was about to do a rear main in a 4bt and when I got to the rear main it was very different than my other 4bt rear main. The rear main seal on one of my 4bt's is very easy to replace. With this other one I am at a loss as to how to do it. Any info. would be greatly appreciated. See pictures. The pics that you can see the rear main is obviously the easy to replace one. The pics that you cannot see the rear main is the mystery one.
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