The manufacture " set " gap is at .060". however, the plugs should come gapped and ready. It will not hurt to check!!!
The 1996 Pontiac Grand Am with the 3400 V6 uses factory (already 'gapped') at .060-inches. The OEM AC Delco Professional Platinum part# 41950; the Professional Iridium is 41993. Again, no gapping is necessary.
OEM, AC/Delco spark plugs. The newest part number AC Delco is an iridium plug and is the perfect plug for the I6 4.2 litre
a/c delco a/c delco a/c delco
AC Delco iridiums
60
Spark Plugs .035Points .019Plugs--AC/Delco R43N
Depends on the year, but the 305 used the AC Delco R44t for years.
ac delco 45 or higher
ac delco a541e
.045 gap
0.035 inches for CR43TS or R43TS AC Delco spark plugs
.040