F135 spark plugs

[megolfer]

What spark plugs should I use in my 1967 F motor. Cant seem to fund much info. Thanks

 

[Rix 45]

NGK GR5

 

[S4Cruiser]

Or denso w16p-u. I recently picked up a box of 10 on eBay for 15 bucs shipped.

 

[ToyotaMatt]

These were spec'd by My shops Denso Rep. based on heat range & reach etc........

he did spend more then a minute head scratching

 

[ToyotaMatt]