67 GMC Dump Truck

[67ChevyPickupMan]

Hello all

I recently purchased a 1967 GMC Dump Truck. It has a gas 351 V6 with a 4 speed transmission and all around power drum brakes. It needs the typical work to get it going around again but hopefully it won't be too hard, I do have a bunch of questions as this is the first GMC I've ever dealt with. I do have a few questions for now. First, one being what series would this be, I'm guessing a C30? My other question is how common are brake parts for these series as well as interchangeable, I figure most parts I can get off Rock Auto, but is there anything special to look for or remember when buying? My last question is I noticed there is a metal inline fuel filter on the frame, would that be original, if so are those still available? Also, I have a shop manual for 67 Chevy trucks, is the information in it transferable to GMC for the most part?
More questions to come in future.

Thanks to all who reply
Jack