Thanks for the inputs on fixing my squealing Atomic 4 thats installed in my 1976 C-30.It was the front accessory drive bearing as discovered by Don Moyer of Moyer Marine. Replacing it was no problem but required removing the alternator, distributor, the fresh water/rear pump, and the small coolant drain pipe. This gave great opportunity for changing previously hard to get at hoses and rebuilding pump and distributor. Be sure you mark distributor position and rotor position before removing same. Thanks again.