Ford CMP Spark Plugs

[Mark Sierant]

It is comming up to Christmas and I have decided to give my two Fords Blitz farm trucks a full service but have come up with a real issue on spark plugs. I have two trucks and a combination of 16 different spark plugs which one is correct? I have rang all spare part shops in town tryng to find a match for a Flat Head Ford motor running a 12 volt ignition system. No one has a clue what heat range or plug type to use in fact many of the younger counter jockeys have asked what is a Flat Head Ford. No one has in stock the short thread type associated with the flat head so I cant even pick a packet of "She'll be Right Plugs" they need to order things in down under.
In Australia I have access to the NKG and Bosh brands are there any sugestions out there that will be nice to my flat heads?