Interesting. I was just watching a video on how to mate an LS4 to 4T80.
Thanks for the link, looks like it's quite a project to add the larger transmission, and would require a custom oil pan to attach the starter, along with a lot of grinding, but when done you would have a bulletproof transmission for a very low price. Also I found another video from the guy that built the Monte Carlo and he said he used the computer and harness from an Astrovan to run the transmission. I don't know enough about these computers, is there a separate computer for the transmission, or would that also control the LS4? He also mentioned the van had a wireless pedal, so looks like more parts to add to the Monte Carlo, must need a specialist to program the computer to work all of these properly!Interesting. I was just watching a video on how to mate an LS4 to 4T80.