'94 GMC Sierra half ton 2WD, 5.7L, 173K miles. I know that eventually the automatic transmission will fail. Pretty much a guarantee. Actually the rear seal is already leaking fluid and quite frankly I don't want to put any money into fixing a slushbox. I love this truck. It's been owned and driven by my father, uncle, my father again, and now me for nearly it's entire life. I love manual transmissions. I like shifting gears and getting better fuel mileage. I know these trucks came stock with an optional 5 speed manual. Anybody completed an auto to manual transmission swap? I would love to start gathering parts from a donor truck but I'm just not sure what to look for or the possible pitfalls or the possible transmission options. The easiest I guess would be to find one of those five speed trucks and just rob all of the parts. Are there any six speed transmissions that will bolt up to the 5.7L with little or no hassle? Is there any Corvette or Camaro transmission that will work in this truck? I'm just hoping all of you with more experience might be able to give me some friendly advice. Thanks!!