Mark... I LOVE flat hood '69 Z28s! Nothing like an original peice. Enough of these fake cowl hoods! Nice car!
Our diverter valve was in trouble too. The Z28 did make a nasty popping/backfiring noise when you backed off the throttle at high speeds. Jerry MacNiesh just rebuilt the pump as a whole unit but he stressed when the motor is restored or rebuilt to then rebuild the smog pump as a hollow unit.
Anyone got some shots of a Frost Green '69 Z28?