what kinda info? only way is to remove the windshield, drill out about 50 spot welds the are part of the joint that makes up the lower flange that mounts the windshield rubber, cut away the braces underneath, including the one that holds/positions the steering column, and reverse the process to install the other one, which has been
removed the same way 
been done, but waaay easier to find a useable Chevy cab and sell the GMC cab
Bill
