Well, I had a mazda b2200 once ... on a 70s blazer frame with a d44 front, 14 bolt rear, 4.3 v6, np235 tranny (I think that's what the 4 spd bull lows are), and an np205 transfer case with about 17" of lift and 37" tires. It passed safety inspection with very big mud guards and toyota head light buckets mounted on the bush bumper

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I could drive it with one hub locked or both and never either in a parking lot that I can remember. In fact, with that much clearance, power, and traction I didn't need 4wd without finding something specific to need it for.
My Suburban on 44s was also welded in the front d60 (I rebuilt the posi in the d70 rear) and I fabbed crossover steering for the front and was all prepared to drill the box for hydro assist but found it really wasn't necessary. I did however mod the Saginaw steering pump for more flow and after that it was one handed steering again.
I must be missing something obvious here as I don't understand how a spool or locker does the same thing but the locker lets you steer while the others don't. Can somebody enlighten me?