318willrun said

Ok, of all the threads and so many topics on SM heads, I thought one on the spark plug holes would be ok. :D Here is what I did....

Calling the gurus.…
PRH
https://www.forabodiesonly.com/mopar/members/yellow-rose.41803/
12many
pittsburghracer
https://www.forabodiesonly.com/mopar/members/fishmens67.28078/
https://www.forabodiesonly.com/mopar/members/cudafever.11691/

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