Hey guys, i got a couple of questions. I have a 1977 chevy pickup, 4x4, lifted with 37" tires. I recently purchased a 383 stroker which i will be dropping in as soon as my Weiand 6-71 supercharger comes in and is installed also. I also will be purchasing a new tranny set up to handle all this horsepower but my question is....should i get the TH350 or TH400?? Also the motor dynoed at around 445 horsepower so i dont know how much more horses the Weiand supercharger is going to kick out. But with all of these factors in mind (383 stroker, race tranny, supercharger, 37" tires, what gears should i go with??? I currently have the GM 12bolt in the rear and 10bolt in the front. Does anyone know the factory gearing for my year? Also i have heard of a lot of street guys going with the Ford 9" rearend in their cars. What would be a good gearing or maybe even a new rearend completely with all the factors listed above? Keep in mind that it is a 4x4 with 37" tires and i will be using this truck for mashing in the sand dunes alot. Thanks guys!