I have a 1996 Chevy astro w/ 4.3 L vortec... these plugs fit that motor.
0.035 inches for CR43TS or R43TS AC Delco spark plugs
.045 " is the correct gap.
Should be .035
You may have a digit wrong. AC Delco does not show that # in their listing.
The AC Delco PF35 is a direct fit for a Small block Chevy V8. It also may fit a Big Block.
what make of car does this go on
1988 Cadillac Deville
Use a Ac/Delco PF61
1969 Chevrolet Impala 327 cubic inches
86 Chevy 350 small block
pf59 AC Delco