Good point, it's been a long time since I worked on any of them. I just remembered that they were 6 lug.
I'll probably be going over there within the next week for some stuff on a current project and I'll see if they will divulge the secret. I wish they were available years ago when I did the conversion to my truck. I'll post my findings.
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