I just bought a half-ton forest service pickup (puke green, spot light, winch, and all!). The rebuilt 305 runs well. Has an aftermarket edelbrock carb with aftermarket air cleaner. It's a 4x4 4speed with granny gear. All seems well, but it shifts sticky, esp when hot. Clutch fluid is ok, and clutch feels ok. Tranny *sounds* ok, but I don't really know.
Also has what sounds like an exhaust leak on the driver side manifold, not sure if that matters.
I'm no pro... just messing around with a cool old truck. Thanks everybody!