AC spark plug application
 

I've got a bunch of NOS AC Acniter spark plugs in the OLD AC boxes. What are the noteworthy spark plug numbers (LS6 L78 L89 ZL1 etc) I should be looking for in the lot?

Re: AC spark plug application
 

Here is a 1969 chart. Then in 70 the hi perf models had tapered plugs (T). I'm sure someone will correct me if I am wrong..

Re: AC spark plug application
 

Thanks for sharing that Darren!

Re: AC spark plug application
 

R43T for the LS6. I would be interested in them if they are for sale and are correct in appearance.

Re: AC spark plug application
 

I've got about 10 sets of R46T's... close. Close is good enough right Rick? https://www.yenko.net/ubbthreads/imag...mlins/grin.gif

Re: AC spark plug application
 

Darren, you've earned your A for the week! Thank you!

Re: AC spark plug application
 

Great reference charts Darren. Thanks for the link https://www.yenko.net/ubbthreads/imag...iggthumpup.gif

Re: AC spark plug application
 

Nearly every single 1970 to 79 GM vehicle,(including Trucks),that came with a 6cyl.,used the R46T spark plug,then they all went to the extended tip R46TS after..

Re: AC spark plug application
 

[ QUOTE ]
Nearly every single 1970 to 79 GM vehicle,(including Trucks),that came with a 6cyl.,used the R46T spark plug,then they all went to the extended tip R46TS after..

[/ QUOTE ]

Into the garbage they go! https://www.yenko.net/ubbthreads/imag...mlins/grin.gif

Re: AC spark plug application
 

Tommy, I'll take some of those R46T's for the Orange Cooler...every motor isn't an L78 https://www.yenko.net/ubbthreads/imag...ns/naughty.gif

let me know...wilma https://www.yenko.net/ubbthreads/imag...lins/beers.gif