Apparently not all of them. My friend has a 56 GMC Suburban Carrier, 316 Pontiac, hydro and it has the same 3.90:1 corporate rear end as my 56 Chevy 3100. Everything is original as far as we can tell. 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
