NOS AC Spark Plugs 327, 409, 396, 427
 

1 box of 8 NOS R45S Acniter with the 4 thin green lines, boxes are dated 1972. These have the extended eletrode. Here is a quote from John Hinckley (aka JohnZ) from the Corvette forum. I have used these regularly in L-76's, L-79's, and Z/28's (all of which have factory domed pistons) and have never had a problem. These are listed in the AC catalog for the following applications.

65-68 Camaro, Chevelle, Chevy II, Chevrolet, V8 327

67-70 GTO, Firebird V8 350, 400, and 455 4-Bbl

61-70 Plymouth, Dodge V8 383 2 Bbl.

$56 shipped in the lower 48

Re: NOS AC Spark Plugs 327, 409, 396, 427
 

1 box of 8 NOS R44 Acniter P/N 5569993 dated 1972 with the early 4 thin green lines. Need to mention if you look in the pictures, the one plug has 3 thin green lines and the upper line is wider. These R44 resistor plugs are listed for the following applications.

55-61 Corvette V8
69-70 Corvette V8 350 (300 & 350 HP)
62-68 Corvette V8 327

67-70 Chevrolet V8 350 & 400

58 Chevrolet V8 348 w/38" reach


$56 shipped in the lower 48

Re: NOS AC Spark Plugs 327, 409, 396, 427
 

1 Box of 8 AC R43N spark plugs P/N 5612425. These are the early ones with the four thin green lines. These were NOS and I installed them in my L78 and went to one show to have my car judged, so the car was only loaded on the trailer and brought back home and I removed the plugs and put my autolite's back in to drive the car. These are listed for the following application.

65-69 Camaro, Chevelle, Nova, and Corvette 396-427 w/cast iron heads

62-65 V8 409

$56 shipped in the lower 48