56 312 Spark Plugs

[goldwinghg]

I'm wanting to change my spark plugs,in my 56 312. The plugs,that are in it now,are Motocraft 5125. I can't find,anything that says,what the should be. Any help,with choosing the best plugs,would be very helpful.

[Snow-T-Bird]

From the website below, you have 8 spark plugs model to choose from :
https://tinyurl.com/2p8zuuym

[paul2748]

I use Autolite 46's in both of my Y blocks, seem to work good.

[ward 57]

Concours has BF-82 plugs but at $4 ea Rock auto has several different makes and models that work if you are not going concours for about $1.50 ea. I bought mine from there and work great. Plugs have changed over time and are improved.

[ICON 1956]

The 1956 Thunderbird hand book that comes with the car just states the type of plug 18mm Anti Fouling plugs the spark gap is
(0.032--0.036) installed as original equipment in the Thunderbird engine. 60 degree tapered seats fit directly on the mating surface of the cylinder heads.
No mention of a brand name.

[ward 57]

I'm sure Rock Auto made sure of the specifications. These engines are not rare and brand name was not listed as that would be Autolite by default.