1977 Bonanza 20, need help.

[philobeddoe]

I just sold my ford f-350 diesel for 8k and bought a mint chevy bonanza for 4k. On the fender it says "Bonanza 20" How do I look up parts? Do I have a C-10, C-20....1/2 ton, 3/4 ton?? It has 8 leaf springs, but 5 wheel lugs. I have an 8 ft. bed. This truck has 79k original miles. It was a barn find....really. What class is this truck??!!! Or what other model is it identical to?? Can someone answer these questions? I have not owned a chevy since the early 90's. It's good to be back!!

ps. I punched in the vin #, and it shows 1/2 ton, but 8 leaf springs?? Anyway thanks for all help.