30 degrees dwell
26-30 degree dwell or adjust points to .017 with a feeler gauge.
www.motorcraft.com shows Point Dwell as 24 - 30 / Point Gap .017 / Ignition timing see Emission Decal on a 1973 Ford truck
the gap on the distributor points is .016, the timing is advanced 4 degrees and the spark plug gap is .030
Hook up a dwell meter and turn the 1/8" hex screw on the point set to achieve 30 degrees dwell. (Engine running)
If you have a dwell tach, the proper dwell is 50 degrees plus or minus two at 1500rpm. If you're too cheap to buy a dwell tach, set it at 0.016" and call it good. On my car, 50 degrees of dwell equals .009" gap. Dwell is the length of time, in degrees of crankshaft rotation, the points are open. Too little dwell and you're not getting spark long enough to properly burn the fuel. Too much dwell and you're just screwing up your plugs for no reason.
a 1973 Chevy truck has HEI Answer And if it does have points, say not the original engine, its .018-.019 will do.
400 ci spark plug r-46ts spark plug gap .040 point dwell 28 to 32 point gap .016 ignition timing 12b fuel pump pressure 5 to 6 1/2 idle speed 650
Pontiac Grand Am was created in 1973.
28 degrees point dwell / .017 point gap according to my Chilton book
YOU NEED A FEELER GAUGE ABOUT THE THICKNESS OF ACRACKER BOX OR JUST CUTE OUT A PEACE OF IT AND PUT IT IN BETWEEN THE POINT AND DISTRIBUTER SHAFT ROTATE UNTIL THEGAUGE IS ON ALOBE OF THE SHAFT THEN TIGHTEN IT UP THAT SHOULD FIX U UP- - - - -Start with adjusting the points to 016" with a feeler gauge. Next, hook up a dwell meter and readjust the points to 50 degrees of dwell.
30 degrees dwell