1962 gmc 1 ton c30

[Ronsmith]

I've got a 1962 GMC 1 ton truck a C30 it has an ho 72 rear axle in it a dual wheel truck I'm looking to find a set of Gears possibly a carrier so that I can make this more drivable I would like to put a set of 355 maybe 373 gears in it does anyone know where I can buy these components or if they're even available. I was going to post a picture of the chassis for my truck but I can't figure out how to put a picture on here. also if I can't find a gear in a carrier does anyone know how close in size the later model GM 14-bolt axle would be in with like maybe something from a 73 to 87 truck