Could you be more specific with your questions? I'm sure I could answer a few. I believe motors would be either the 305, 350, 6.2 diesel, and I believe there was a 6 cylinder model as well. I thik the later model ones came with 700R4 overdrive transmission that had torque converter problems...
All in all, they're good trucks. Try to avoid rusty ones, and try for fuel injection as well, you be glad when you start paying the gas bills for one.