ps pump differences
Race Director
Joined: Nov 2002
Posts: 12,142
Likes: 54
From: Taylor Michigan
It could possibly be the hose connections. Early style pumps used flare fittings and hoses. Later model use "O" ring fittings and hoses. There are adaptors but not widely sold. The steering gears are similar in connections. One has to match the other........
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
SteveG75 is correct about the pulley shaft difference.
The hose was the same from 1963-1979. In 1980 GM went to a different pressure hose with a different flared end. This remained the same from 1980-1982.
Willcox Inc.
The hose was the same from 1963-1979. In 1980 GM went to a different pressure hose with a different flared end. This remained the same from 1980-1982.
Willcox Inc.
Racer
Joined: Jan 2006
Posts: 256
Likes: 0
From: Norfolk VA
I just put my ps pump back in and was going to replace it. I saw all the options and wondered the same thing since there are different numbers for the years, but they looked the same to me. I just decided to strip and paint mine 
