Thank You for your opinions on silicone gasket material usage on engine assembly. Just needed to have a little moral support to know everything is done to specs. Nothing is easy when rebuilding these 351's - the E and M being hardest to get gaskets for. A side note to this is I have 2 broken sets of NEW oversize pistons FOR SALE along with misc. engine parts from (2) 351's - if interested please contact me. THANKS AGAIN for your help.