I've always preferred manual transmissions but my left knee is telling me it's time to start getting familiar with autos. I have an '81 gmc jimmy 2wd that currently has no engine or transmission. I'd like to put a 250 and 200-4R in it. I'm considering the 200-4R because I've read that it's more efficient than a 700-R4. The rear currently has 2.73 gears but I'll change that if I end up with an overdrive transmission. I have the engine already but haven't gotten a transmission yet. Please tell me what I need to know to make sure I get the right transmission and what is critical to make it work well. Thanks.
