Pretty sure the 3 plugs are 1/2-20. TRF sells a stick of 3 of the correct plugs for less than $6. Part no. Is PU1404/3. Ed Woods -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://autox.team.net/pipermail/triumphs/attachments/20180207/aa0571be/attachment.html>