phl,
I believe you are 100% right about that. Come to think of it, when I ordered the crank bolt for the 3.5L engine overhaul, I simply reordered the same crank bolt from my 3.0L engine overhaul from 6 months prior.

Dang, my mistake. I didn't realize there was a difference. I really aught to contact the new owner of the 1997 Montero. I want that thing to stay on the road and if it goes down because I made a mistake, that will make me feel responsible. Thanks for pointing that out.

I'll get a hold of him right away. poolecr, take my photo of the pulleys and my crank bolt with that grain of salt. That was my mistake and a good catch by phl.