I don't know how deep you will have to notch the frame but I do know that the further back you can set the engine in the frame, the better your traction and the more balanced your vehicle will be. I winced at moving mine forward 1 inch to clear the alternator but the true consolation was the fact the engine is supposedly about 85 lbs lighter than the LT1 I took out of my 92 C1500 short wide bed extended cab.