AC spark plug application

Tommy_Mathison · #1 10-02-2009, 06:37 PM

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?

DarrenX33 · #2 10-02-2009, 06:49 PM

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..

**MosportGreen66** · #3 10-02-2009, 06:58 PM

Thanks for sharing that Darren!

**SS427** · #4 10-02-2009, 06:59 PM

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

Tommy_Mathison · #5 10-02-2009, 08:30 PM

I've got about 10 sets of R46T's... close. Close is good enough right Rick?

Tommy_Mathison · #6 10-02-2009, 08:31 PM

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

Verne_Frantz · #7 10-02-2009, 08:51 PM

Great reference charts Darren. Thanks for the link

**Mr70** · #8 10-02-2009, 09:59 PM

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..

Tommy_Mathison · #9 10-03-2009, 04:02 AM

[ 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!

**WILMASBOYL78** · #10 10-03-2009, 04:12 AM

Tommy, I'll take some of those R46T's for the Orange Cooler...every motor isn't an L78

let me know...wilma

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