The bellhousing patterns are different in some KM145. You should have the wide pattern. I have had two of these fail in two different trucks. Definitely the weakest link of the drivetrain. Even quality rebuilds fail. I second the notion of getting a used one at the junkyard with a guarantee. It will last just as long (or short) as a new one! The tranny issue is what prompted me to go automatic for my current project.

83 mitsu flat bed 2.6l weber, 88 auto tranny, 2" body lift, 4.625 LSD, 235/85-16E mudders (33 x 9.50).