33x10.5 on Factory Wheels

[C.I.Blazer]

My 71 currently has a 4" lift with 35x12.5x15s mud terrains on it. Since this will primarily be driven on the street (75% road with maybe 25% forest service roads) I want to go with a more street friendly setup. Thinking about a 33x10.5 BFG All Terrain and ultimately a drop to maybe a 2 or 3" lift.

My ideal would be to find a set of 15x8 steelies (like everyone else I know) but I have had no luck. Alternatively I was looking at some 15x8 or 15x10 Mickey Thompson Classic IIIs. I ended up finding these for what I think is a really good deal. I believe these 15x7s were a factory aluminum option on the early 80s from what I have read.

So, my questions. Not sure exactly what the backspace and bore size is. Anyone know if they should fit? Also, any issue with running 10.5" wide tires on a 7" wide rim versus an 8" wide one? I know they fall at the minimum spec for the tire. Any thoughts on how they may look or how they may handle?

Thanks!