options for quick ratio gearbox question???

[BB70c10]

i've been told a steering gearbox from a 1998 jeep grand cherokee will bolt right into my 70 c10.Im looking for a quick ratio gearbox.if the jeep one will not work are there any other options that are quick ratio that i can find at a junk yard and rebuild.Im also swapping my sbc to a bbc 454.does that make any difference on gearbox choices?i can get the jeep gearbox for $50.00.not sure if the gear box is all i need-may need pump,lines,etc.if this question has already been answered a thousand times here,sorry, im new here.I tried doing a search for it before starting a thread but had no luck.Maybe someone could tell me how to search properly before starting new threads on already answered questions.any help would be greatly appreciated

[hdflstf]

Don't know about the used stuff but I just put a new AGR variable ratio box on mine. Hope to be driving it in a couple more days so I can report on it.