Hey, I'm putting in a 454 into my 87 blazer. Any tips? What will I have to change? I want to keep the computer. I understand that there is no provision for Torque convertor lockup? No knock sensor either. What about motor mounts? The 454 came from an 89 suburban, but I got a performer TBI manifold and mild cam set. Any other performance tips? 310-70R15 tires. Should I change the rear to posi? Please help. All advice appreciated!