Hey to all.I like this site.I am going to learn a lot and promise to research w/out asking too many ??s.But I am stumped.I have a 56 gmc with ser # 101px8957.So by the numbers it tells me i have a 100 series shortwheelbase but it has dual rear wheels and they are 17".Are all the spindles the same even if it has 8 lug wheels?The rear end is 10 bolt i believe and i think is spicer 45 a.Are my serial #s wrong or did they make a dually 100 series.It all looks stock w/ no mods that i can see.Some rust but nothing unfixable.The model id plate from the inside of the glovebox is missing but i got the info i posted here of of the door pillar.So i guess if anyone can tell me what spindle and bearings i need considering the 8 lug wheels it would be a big help and also is this truck a bit rare or rare option.Any help or answers will be very much appreciated.Thanks newbie
Johnny 56 gmc dually

Thanks Johnny