8 3/4" from a 1/2 Ton P/U or Van For "A" Body

Their all the same amount of work to narrow. A-body axles will work if you use A-body brakes, which will bolt right up. The pinions aren't always the big ones. Lower powered trucks (slant 6's and 318's) often had the 741 case. It's still a very capable unit. Lots of guys running them in race cars turning 11's. I have a rear out of a 73 Van I'm narrowing for my Cuda right now.