my 76 w200 had 9-3/4" dana rear axle. I don't think I've ever seen a 5 lug 3/4 ton, or an 8 lug 9-1/4" full floating Spicer. I havent seen it all, yet, but it would have to be rare for sure.
There's a chart floating around one of the 4x4 forums that listed them all. I'll try to find it.
It's weird what axles mopar used back then. My 78 w200 has Dana 60s front and rear but standard was the Dana 44HD for the front and a 9.25 rear for that year.
