Hy Tom Perini, the short answer is yes, however it is not a drop in swap, the GMC engine is longer than the Chevrolet, so a front mount will have to be made up, and you may have to position the radiator farther forward, this swap has been acomplished many times, there is probably info if you search "engine swap to GMC engine" or something similar, hope that helps.
Last edited by 3B; 08/04/2009 8:30 PM.