[BCreekDave]

Originally Posted by madden

HI

yes it calls for

# R43 with 4 thin green lines= orig
OR
#R43 with 3 thin and 1 thick green=replacement

thx
chris

The Dueces MAY be different..not sure why cause the engine was a CTB Camaro Z28 engine when it was built up at Flint, but the Z28's factory fitted plugs only had one ring:

http://www.1970z28camaro.com/engine/0142.jpg

http://www.1970z28camaro.com/engine/0136.jpg

They may have changed through the year.

There is a set here:

https://www.ebay.com/itm/NOS-AC-R43-...CPiY:rk:1:pf:0

I HAVE NO IDEA IF THESE ARE WHAT THE SELLER SAYS THEY ARE! I DON'T KNOW THE SELLER AND HAVE NEVER PURCHASED ANYTHING FROM THEM. CAVEAT EMPTOR