Oooops.... After installing the left and right bank intake gaskets. I gave my dog the front and rear seals for dinner and used Copper gasket sealer for front and back seals. MY PROBLEM is at the front seal. I used Copper sealer on the front leading edge BUT I did not go completely around the back of the circular hole for the crankcase filler pipe. Do I have a problem? Should I bite the bullet and just take everything apart now before I go further? On the manifold which I took off which was not correct (250 HP), did not completely seal with it because of an open slot anyway. I didn't look at the bottom of the 300hp intake manifold to see if the slot was there. hmmm