[4x4k30]

Originally Posted by Chevy3+3

What had to be milled exactly on the 400/203 spacer? Also what did you use for a computer to control the transmission? What harness shop did you use?

hi its the front where the tcase hooks to the trans. where the six bolts are .it has to be milled go to pirate 4x4 and there is all the info there. the transmission is shifting fine I used the wireing harness and computer out of the 06 gmc that I bought and got the engine and transmission from I bought a 2006 2500hd gmc that was rolled over and got everything out of it.http://www.pirate4x4.com/forum/chevy...400-np205.html they make this adapter too