Thanks everyone! Last season I used an Indy plate..which is not ideal for Edelbrock heads....more gap between the plate and head than I would have preferred! I used the black Chrysler Corp. silicone sealer,and it worked,but still seeped oil! As far as using the tin factory pan...I've ALWAYS had bad luck with those! Maybe I should try again...but,the port openings would have to be opened up slightly,to match my heads slightly larger intake windows. I have some decisions to make! I HATE ANY OIL LEAK!...especially into the combustion chambers...which was my problem using the tin valley cover in the past!