They're few and far between, and expensive to boot. Unless you're working with a factory original H-M truck, swapping from a manual trans to a hydro is a huge job with not much chance of success. If all you want is an automatic instead of a standard trans, it would be simpler, and less expensive to retro-fit a 6 cylinder Stovebolt to a Powerglide, or possibly a Turbo 350. Stay FAR away from a 700R4/4L60!
Jerry
