List of spark plugs used, 53-75?

[Mike E.]

[Duke W.]

Re: List of spark plugs used, 53-75?

They should be listed in the AMA specs that you can download from the GM heritage Web site. Some years ago I downloading all - back in dial up days... took some time, but I got 'em.

Duke

[Richard M.]

Re: List of spark plugs used, 53-75?

Mike, Here are a few pages from the Parts Books that may help. They're service replacements so not sure if it helps what you with what the factory installed.

At each page click NEXT(or PREV), lower part of page for more. I started a search by entering a GM part# for the AC45 plug(1559493) and it brought many books pages up. Probably many more in there but I just did this one example.

up to 1964: This has a good listing for many GM vehicles.

http://www.gmpartswiki.com/getpage?pageid=6911

up to 1970:

http://www.gmpartswiki.com/getpage?pageid=18662

Here is a page with GM Part# to AC #

http://www.gmpartswiki.com/getpage?pageid=25862

I also found the GM# for the big block plug R43N, 5612241 and found a few pages here in the 1979 book.

http://www.gmpartswiki.com/getpage?pageid=99004

Some more cross reference info here....

http://www.gmpartswiki.com/getpage?pageid=223573

[Mark S.]

Re: List of spark plugs used, 53-75?

Mike:

I have all the owners manuals. If there are some holes in your research, I can check mine.

Mark

[Mike E.]

Re: List of spark plugs used, 53-75?

Thanks for all the help, guys! Now the challenge is sorting out the discrepancies.