63 k10 rear axle seal inside drum

[Builtlikeatank634X4]

Hello
I'm new to this forum .. I'm finally starting to repair a truck I bought that was sitting under a tree .. 1963 k14 .. 90% original .. Was ordered from factory by a school district and was equipped with a snow plow .. Plow is gone .

I'm starting with the brakes so it will stop cause the engine runs strong .. I removed the rear drums and one side has a heavy syrup kind of glaze all over the shoes and inside the drum .

I looked behind the axle where the wheel mounts and inside the brake backing plate and there is a 1/2 inch gap compared to the opposite side axle .. I have the repro factory assembly manual but it does not cover brakes or axle diagrams ..

I took these photo's that show the gap in first two compared to the third photo of the other axle .. My concern is this a damaged part that is obsolete and will I have to replace the whole rear end ?

I'm finding out with the front brakes how many auto parts stores don't carry the correct springs or brake shoes and there inventory lists the shoes as universal front and rear .. But mine is the k10 with a Dana 44 with warn M8 locking hubs

Any help and advice would be greatly appreciated until I purchase a factory shop manual

With respect
Thank you