Originally Posted by
turnrjr
The book says my 223 should use H10 plugs. I can't find them. Searching turns up lots of substitutes. What are you guys using? Does it really matter as long as the bottom end is positioned correctly in the head.The truck is a 54 F100 but the block is newer. Plugs are 14 mm thread. Thanks.
7RA-12405 .. Spark Plug
Originally these were Champion H10's.
When Ford bought Auto-Lite, they became:
7RA-12405-A .. Auto-Lite
AL7.
When Ford sold Auto-Lite in 1972,
AL7 was replaced by:
B7A-12405-A .. Motorcraft
BTF6
Considering the 100's of different vehicles that used Champion H10's, I find it impossible to believe that no one has any.
Try a good indie autoparts store. You could also try Green Sales in Cincinnati OH (800-543-4959).
The chain auto parts stores are clueless when it comes to parts that haven't been used since grandma was a girl.
EDIT: Dennis Carpenter (704-786-8139) has
Champion H10's @ $3.50 each.
Their part number:
7RA-12405-H10