Need help decoding a partial vin on a 64 gmc truck

I'm looking at buying a 64 gmc from out of state and I wanted to make sure it's a 1000 series 1/2 ton and not the 3/4 ton. I have a partial vin which I believe to be the second half so I'm not sure if that info is in their or not. VIN#: PF3077A. It has 6 lug wheels so I guess that's why I'm second guessing. Any help would be appreciated!


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!/2 ton pickups of that era had 6 lug wheels,3/4 ton are 8 lug.

 

Thanks!


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