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I have a 72 shovelhead engine and I want to know what type of spark plugs can I use in it instead of harley davidson and also what would be the best oil to use in it instead of harley davidson also? About how many quarts would I put in it too? I think 4 but not sure. Thank you for your help!!

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Try this for your plugs - might give a couple of options. maybe a later one will do?
http://www.harley-performance.com/harley-spark-plug.html
Amsoil 20w-50? Depends where you are and what you can get. I think there is a rev-tech oil to suit your shovel, but can't remember the spec off hand. Havoline 20w-50? Oil debates seem to rage on forever on most H-D forums around the world. Have found for me the H-D stuff is about the same price as the rest, and just as good/bad as them.
As for quantity, I'm thinking it is about 31/2 to 4 quarts, as you said.
Check these guys out - maybe better answers than mine mate. http://www.shovelhead.us/
Hope this helps you.

Posted on Jun 25, 2009

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Posted on Jan 02, 2017

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