904 torque converter recommendations

That’s what I thought, damn. Must be the right one, lol ! You’re talking about a 3/4” machined groove about 1/3 of the way around on the inside or outside perimeter ? A 318 balancer has no grooves or machined circle divots ? How come *** clowns on EBay sell balancers listed to work on all 3 engines ?

That's correct. That's a better description than what I gave. It's either that groove, or the one with the extra weight. The two are interchangeable.

As to your other question........because they're stupid. lol