The surfaces of the contacts deteriorate to a point where they either weld together or won't conduct electricity. OR The fibrous cam follower wears down and the points don't open properly. Either can happen.
0.019in
inside the distributor.
No.
attach a dwell meter and set the points for 30 degrees.
a 1973 Chevy truck has HEI Answer And if it does have points, say not the original engine, its .018-.019 will do.
no
NO.
YES.
Use a dwell meter to set the gap at 30 degrees.
Points, condenser, cap, rotor, plugs, wires, air, fuel, and oil filters.
Use a dwell meter to adjust the points to 30 degrees dwell.
When set properly, the gap would probably be about .018". The correct way to set the points would be to hook up a dwell meter and adjust the points for 30 degrees dwell.