Let me clarify the cooling. I did all the upgrades 5 years ago and have been driving for years w/o any electrical problems. This is probably not related but when I jumped on it I actuall missed 4 gear and I rev'd the engine pretty high, say 5k + then found the gear. It's got a crane roller cam with roller rockers so every thing is fine and I don't have a rev limiter on the MSD. Wonder if I fryed the MSD tac box? Can't work on her now but I'll check later. Thanks again for the diagram, is it for a 74?