Rear suspension bolts?

[benscool1]

I'm switching the rear suspension on my truck to a different chassis, leafs, differential, hangers and all. Well I have all the rivets off but the hole is a weird size, its bigger than 3/8 and smaller 7/16. I think I might have to use a metric. I'd prefer not to have to drill EVERY ONE of the holes out to 7/16. What did you guys do? Can you get metric grade 8 bolts anywhere? I'd need a cobalt bit to drill them out, and that would cost me an arm and a leg. What have you guys done? Like I said, if I can get a metric to fit that would be awesome, but I don't wanna have to drill out all the damn holes unless I have to.

BTW, to save myself the trouble of starting another thread, will a bezel out of an 84(but the guy says it has the wiper controls in the dash, not on the turn signal) fit a 73?