Welcome to CK5 dude. /forums/images/graemlins/smile.gif Where in Cali is Lemoore? /forums/images/graemlins/thinking.gif
The standard t-case in a '90 is the 241 with the electronic speed control sensor thing. To get the truck operational the fastest and cheapeast with the least amount of hassle, thats what you'll need. A 241 from a '90 or '91 K5. The '89 and ealier models still had mechanical speedo's, so they wouldn't work without alot of trouble. The 241 is the lowest geared of all GM t-cases, which is a plus- I think it's 2.72:1? Someone else will have to confirm that. It's plenty strong for about 90% of the wheelin we do. Yeah a 400/205 combo would be nice, but that is also the highest geared tranny/t-case combo available from GM, and the 400 is a HP thief. I have heard any where in the range of 10-25HP to run it. And not easy or cheap to swap into your new rig.
And before a certain ass hat on this board can open his pie hole- I have run every tranny available in these trucks, except for the 700r4. 350/203, 400/208, and now the 465/203. All in my '76. I broke both the auto's behind the big block, now the 465 holds up fine. So I DO have practical, hands on experience with the subject at hand. /forums/images/graemlins/pimp1.gif