I know, I know: "GRADE 8". It's not that simple (I think). I have pulled my old swing away tire carrier on my '72 K5 and stripped and repainted it and am wanting some input on re-mounting. Sorry, I don't know how to draw and post a diagram so here goes: It originally had a 7/16" grade 5 bolt, large fender washer, upper arm of swing away, mount bracket, lock washer and finally the nut (this is from top to bottom) through a 1/2" hole. The bolt sheared when I removed it (it may have had something to do with the 2 three foot breaker bars I used) but it was fully threaded with the threads all eaten up from movement and nothing to really help with not binding. My idea was start with grade 8 in a smaller diameter slipped through a 1/2" steel sleeve spacer (at just enough length to go through arm and mount bracket) to keep it from binding using the same washers to try and "trap" the spacer, so it works kinda like an axle. I'm wondering if the spacer is going to create a weak spot in the setup (and I couldn't find grade "anything" spacers) Or should I just keep it simple and cram a grade 8 1/2" bolt with no thread at the top in there and will this cause binding as well since the hole's only 1/2"? Or just shut up and stick with the original set up @ 7/16" in a grade 8 and stop trying to complicate things?