I recently destroyed my 89K5. A pair of trees isn't very good for your truck when you plow into them. What's more, I overheated the engine something terrible in the extraction. But I have a line on a TBI 7.4 for a good price. My question is, do I need the ECU and wiring harness from the 7.4 or will the ones from my 5.7 work? Since the money is about the same, I am thinking of using the Glassworks Unlimited 88-98 conversion front clip. But using the grille and headlamps from a 99ish Denali. It will take some 'glassing in' but I think that it would look rather trick. Opinions? Thanks. st_brownlee.