CJ cylinder head size

[mejia64]

any body knows the size of the core plugs on the cylinder head, i have a 1982 Jeep cj7 with 151ci/2.5L L4, VIN B for AMC and Head Cast #: 702
the core plug is in the rear of the head the front have a Thermostat
Thermostat open to front thanks for any help you can provide

 

[superj]

i don't know it but you can buy some plugs that have a bolt through them and you tighten the bolt until it squeezes the rubber inner part and seals that opening. they are sometimes at your local autopart store on the self help aisle. called some kind of repair freeze plug.

i have used them on bmw and jeep I6 engines

 

[superj]