[worthirt_99]

I wouldn't use an 8.8 bolt in place of a 10.9 either, now if you came across something higher, I would say go for it. Look on ebay or go to Fastenal for the bolt you are looking for, you will prob find it cheaper at either of those places. If you put everything together correctly, you shouldn't need threadlocker, but putting a couple of drops on the bolt just before you thread on the nut wouldn't hurt anything.