Well I just did a tune up ( plugs, wires, distributor cap & rotor button ) on my new to me '97 Suburban 2500 4x4 454. Don't think the distributor cap has ever been changed. Thought I was going to have to remove the Intake Manifold to reach one of the Distributor Cap screws ! Had to use a Dremel to remove some flasing. Any body know any tricks for this?