[Okiefromwatonga]

Originally Posted by bigblockv6

The 432 is a magnum engine that was introduced in 1973, basically a 401 with the 478's longer stroke. The spark plugs are a short reach tapered plug, If I'm not mistaken it's an AC R43T which is an old number so it needs to be crosslinked to a current number, this was a common lug used back then and shared with other GM engines

Awesome thank you. That's exactly what I was wondering. I read over on stove bolt about different plugs and was in the dark about the vintage of the 432 so I thought I would ask. Does this look right? http://m.autozone.com/external-engin...&showymme=true