I've ran the Mr. Gasket P/N 1135 for 10 yrs (125-200 passes a yr depending on how well I did) with 440 source heads without an issue. Did freshen up the engine twice during that time. Was running just a tad over 10:1 compression. Never had an issue.


Last edited by DusterKid; 06/01/18 12:07 PM.