[69gmcc10]

Quick side note, when I put sortie headers on the old engine I had some problems with the header and the plug wire on number 8 contacting each other, so much that I had to add a heat sleeve to cover the boot. To combat this and not use Accell header plugs I had heard a rumor that NGK plugs were shorter than other plugs by about 1/4". If you call NGK and point blank ask them if there plugs are slightly shorter they will respond with, "Our plugs are made to O.E. specifications, so no they are the same size as any other plug for that application." Obviously they don’t know there own product because they are shorter and gave me more room than the Autolite plugs I had before.

So, if you are looking to buy some wiggle room from your headers and don’t want to go Accell grab some NGK plugs.