My 351W won't start. Turns over fine, but won't fire. It's getting gas, as I've flooded it and can smell gas. Looks like it's not getting any spark. Tried a test lite between distributor and coil and between plug wire and plug. In both cases, it sparks momentarily when turning on ignition switch, but doesn't spark when turning engine over. Think it's my MSD Ignition box (6AL) or MSD Coil? Something else?
Walter