ac delco plug r45stx is a good plug for all 350 olds eng. w/hei gap is set at .60 thousands do to the hotter heat range
Spark plugs
The spark plug gap for a 1977 Olds 403 is listed as .060 inches.
The spark plug gap on 1977 Chevy truck 454 should be set at .045 inches. Spark plugs are preset at the factory and should need no adjustments prior to being installed.
I use the QL77JC4 Champion plugs with a 0.030in gap.
According to one of Fords websites : For a 1977 Ford Bronco , 5.0 L / 302 cubic inch V8 engine : The spark plugs are gapped at ( .044 inch )
Spark plug wires go from the distributer to the spark plugs which are located just below the valve covers between the exaust ports.
The recommended spark plug for the 1977 model, 7.5 hp Mercury outboard is a Champion L78V, or NGK BUHW-2. Both brands are Perma Gap type plugs, with the Champion being the manufacturer supplied plug back in 1977.
Oldsmobile used Chevy 305's. 76 350 rocket 77 305 Chevy
Rocket Racer was created in 1977.
Starting point is to check for fuel at the carburetor and spark at the plugs. Whichever one is not there will give you a place to start backtracking to find the problem
Spark in the Dark was created in 1977.
Spark plug gap for a 1977 Corvette using ACDelco R45TS is .035