ok i have already gotten allot of help on this from some of you guys, thanks allot to thoes of who helped. Anyway I am putting a sm465 into my 88 4x4 auto blazer and i just wanted to makesure i have everything as i want to try and get it done this week end. Anybody have and last minute suggestions or tips / tricks, also any small parts or stuff that is likely to be overlooked i think i have everything but im not sure. And finally the question i havent been able to get an answer to do i need to do anyhting with the computer ive had about the same # of people tell me yes or no so i just want to know if i do what will happen its just going to idle roughly and possibly stall correct? I called my pontiac dealer (yes not chevy the chevy dealer sent me there) and the guy swears i wont need to he says he has the same truck and did the same thing so i figured ill put in the trans and drive it down there if it feels fine then ill leave it if not ill get it reprogramed.