not sure, absolutely do not know the gasket material..composition...or Prematex super 300 qualities..we need more info..
-for the record, i'm not a fan of GOOPING up a quality gasket of any kind..your mileage may vary
Hi Gary, I put the ferrules and o-rings in the head, and did not apply anything to the head gasket. I don't have any leaks and had no problem fitting the head. I can't say though whether the other options are better
On the block, as mentioned in D311 service maual page 144, larger side of seal towards block and use the Permatex 300