1977 305 doesn't have points unless the distributor has been replaced with an older design. Point gap on any V8 Chevrolet is 30 degrees dwell.
The point gap should be set for 30 degrees dwell.
The Peugeot 305 XSI was manufactured in France from 1977 to 1989. During this time, the 305 was expected to be called the 405 as people assumed it was meant to fill in the gap for the recently discontinued 404.
013 - 014 thousands
Use a dwell meter to set the points at 30 degrees dwell.
30 degrees.
The Spark Plug gap is .045
Per Champion spark plug applications chart, the gap for 1989 Chevy 305 (5.0L) is .035.
It is important to gap the spark plugs at the right size. The spark plug gap for a 1981 305 Monte Carlo is .045 inches.
.045
0.045
.045
.45