cragars,tires & 71 Duster

Here you can see old photo of my 71 Duster.
Car has relocated springs and moved axle, not mini tubed.
Rims are Weld Draglites 15x9 with 4,5" backspacing.

Tires in the picture are 275/60 15s... no rubbing at all.
Size of tire on the wheels is more less:
TD: 28"
SW: 11"
TW: 9"

I replaced these with MH Racemasters that also are 275/60 15s but are a bit bigger and they measure:
TD 28,5"
SW: 12"
TW: 10"
Again no problems at all, just these tires don't last too long ;)

Now I'm tempted to go with MT 29x12,5-15 or Hoosier 295/60 15s.
Hoosiers seems to be a safer choice as there is only has 0,5" more section width and around 0,5" bigger diameter. Will be tight fit, should get in but this is about it without cutting.