non vortec to vortec swap?
 

does anyone know from a 1991 s10 blazer 4 door 4 wheel drive 4.3 tbi, getting a doner 1996 chevy s10 blazer 4 wheel drive with the tpi vortec, how can I swap it in? Of course I need the wiring harness and computer, but I want to keep the original digital dash. Has this been done? I've looked and can't find someone who has done it. What wires for what go where? What needs to be spliced together? And, would I still need the original computer? Any help would be appreciated.... Thanks guys!