Mikw
NGK ZFR5N Plugs are the best. Gap at about 35-38 then when you switch to HEI reset gap at 45.
BTW we arrived up north fine. Just went to see Harry Potter DH part 1.
Frank
Hello Frank, I have the NGK ZFR5N Plugs and need an up date and see if I am reading the thread correctly on removing the washer for my 66 model /170 engine ?
the tread Locdogg showed me said = My preference is for NGK ZFR5N. Remember, if yours is a 1963 to 1974 head, remove the spark plug gaskets; they're not used.. So I should remove the washer they are calling a gasket ?
