yes, I went 5 on 4.5 wbp. I used 76 new Yorker front rotors and my A-body 8 3/4 has 5 on 4.5 Moser Engineering axles with green bearings.

that makes a stock A-body axle a 1/2" wider over all = 1/4" each side.

what axle is under the truck 10 bolt or 12 bolt?