I traded my 49 chevy 3100 on an s10 chassis w/ a 5.3/4L60 combo for a 51 chevy 3100 on a 69-72 k5 blazer chassis. The 49 was fun but the cab was in bad shape and i really wanted a 4x4. The 51 has a 350 carb'd/TH350 and NP203(part time?). I picked up a 6.0/4L80e pretty cheap as they are hard to find here in NY. I plan on keeping the NP203 unless i can find a cheap NP205. I'm lucky to have george at transfer cases unlimited locally so im probably gonna drop off the 80e and np203 to him for mating.