Since my eg is going full drag i am going to take out the heater core. Ive already welded the water pipe close and now im wondering if any one know the size of the plug i will need to plug the part of the head the heat core hose run into.

Thanks
Brian

 

Bump, I would love to know the size plug for a b18c1 if anyone knows it.

 

The same plug that uses a crush washer and plugs the holes where the rocker rails go into the head.