On my '67 (alt only), there is a bolt that runs through the base of the alternator into the front of the driver's side exhaust manifold. The bracket on mine bolted to the water pump housing, but that bracket was not the original, so it looked a little funny, but functioned just fine.

Pessimist - Sees glass as half-empty. Optimist - Sees glass as half-full. Gov't- Sees glass and takes it from you because you have a glass.
Political Correctness: A philosophical belief system bereft of common sense and logic, that supports and rewards ignorance and stupidity.