This is my 77 C30. I don't know a bunch about the history of this but when I got it a year ago it had 105k original miles on it. It was a second (or more) hand truck for the lady I bought it from. Her understanding is that it was mostly a farm truck before she bought it. That would tell me it either was sitting or working hard, not a lot of middle of the road there. Depending on the farmer, it was either well maintained or just looked at when something broke. I lean toward the latter. The lady I bought it from didn't use it often, usually just to get a few loads of firewood in the summer and a couple spring cleaning dump loads in the spring. In summery, I think it spent more time sitting than anything else, at least in the last decade. It has the 454 with the original Qjet and after some tune-up work (not nearly enough) it will pass anything but a gas station. I'm not looking to make this a hotrod but I'll admit that having a truck that will move like that is fun. It has a new battery, alternator and starter as all three of these had issues when I took possession. It has new plugs and wires and cap and rotor. It really needs a new distributor but we'll get to that. When I took possession, I knew that there was a small issue with the brakes. The issue was that only the front right brake worked. New brake hoses up front and a new master cylinder and it now stops on a dime and gives 9 cents change. Power steering hoses were leaking a bit so we planned on replacing them... right up until one started hosing down my buddy. New hoses led to a new pump. Steering is good now...Almost. It needs an alignment but there is more to that then I am ready for. When I got it, the truck would flood very easily. Upon further examination we determined that the float didn't. A rebuild kit and bunch of cleaning later it works much better. I'm not convinced it is set properly but it works fairly well and I get about 12MPG with it now. It also came with overload springs so you could drive over a dime and tell if it was heads or tails. I cut those out and the ride is much better. The AC Compressor was removed years ago. I have since removed the condenser. I really don't plan on putting AC back into this truck. In NW Washington it can be nice but it really isn't necessary. It will also help keep things cleaner under the hood. I also replaced the defrost fan. It didn't work and I had to use a portable fan for defrost. Now I have heat and fan and life is good there. That pretty much sums up what I have done to this truck so far.