Phil,
Check with ABS in Orange, CA. They do a lot of brake and steering conversions in their shop and sell the kits & parts. They have a good selection of pitman arms, and have always found the parts I've needed. 714-771-6549 www.abspowerbrake.com
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