Big Block and Power Steering

I have some pumps. Probably should be rebuilt or resealed as they have been sitting for 20 years. A TRW pump may also fit.I see Murray confirmed that. I don’t think the Federal came out till 1970, I could be wrong though.what is different on ur w/p housing? 1972 would have the inlet on the pass side. And yes the p/s mount is narrower then. P/m me if ur interested Kim