I'm trying to down size some stuff and found that I have two power steering boxes in the garage. One has what looks like Q-2267282 cast into the housing with an R5 below that and another cast number of 5 1 1 1. The second box looks like a G-2267262 with another cast number below that of 1 68. I suppose the Q could really be a G, though its pretty hard to tell. Any idea on the application? What about the dates? I'm trying to figure out what one I should keep for the 70 Challenger I have.

Thanks.