The last one that I did I used the washer kit from Bill's Hot Rod. It is relatively a straight foreward procedure, remove the fitting from the pump, remove the control valve, dissassemble and add the washers as indicated in the instructions, reassemble. I think it came from Speedway or Jegs.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine