Thanks for sharing all this info on possible mods, and the base motors.
I'm in the midst of building a B230FT, and would suggest an edit to your main post. I have blueprinted my late model B230F block which was cast on 12-29-1989, has a cast K in the side, the larger main journals, and the thrust bearing on the #5 journal. This suggests your data on the K blocks is inaccurate. You might add a disclaimer for other people reading this. You wouldn't want to avoid a K block if you're scouring for parts!
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