.045
The Spark Plug gap is .045
Per Champion spark plug applications chart, the gap for 1989 Chevy 305 (5.0L) is .035.
The recommended spark plug gap on a 1996 Chevy C1500 with a V8-305 engine is .060"
.035
.035
.45
.045"
.035
Sorry but I do not under stand your question.
Drivers side, first spark plug in front is #1
0.035
Depends on the year, but the 305 used the AC Delco R44t for years.