Ed, thanks for the updated info on the bolt numbers and size. I had gotten a set on ebay that measured 2.5" as they came from another spacer that was just a 1/16" difference than the one I have. They just went to the last thread on the flange and stopped, like I'd have had to wrench hard to push them past the back of the flange.
Pete, yeah the bolts hit the last thread on the flange and won't turn past it to stick out a bit in the back. If that is how they are supposed to be then the bolts I have should be fine that I purchased and I've got a problem then with the flange that I'll have to fix, probably retap, so the little extra bit of bolt protrudes through the back side of the flange. Just didn't want to go that far if I was missing something else.
Thanks guys, great help. Hope this solves it for someone else down the road. Cruise on!