When one of those hoses, fittings, or joints starts ... Connect the smoke machine's nozzle to the manifold. A good place is through the large-diameter vacuum line to the brake booster.

It’s part number D!ZX-9425-CA. The brass fitting supplies manifold vacuum for the distributor’s dual-diaphragm advance canister. The Boss 351 coil is the standard Autolite yellow top.

THE BRAKE BOOSTER VACUUM SUPPLY HOSE ATTACHED TO THE INTAKE MANIFOLD FITTING MAY SWELL OVER TIME AND LOSE RETENTION FORCE. THIS CONDITION COULD ALLOW THE HOSE TO BECOME DETACHED FROM THE FITTING ...