It pretty much sat flush on the table. I am attempting to post a pic of it. I am assuming this means it is the correct base plate. A kind moparts board member has offered to sell me a factory cast iron intake that I think I am going to try. If that does fix all my problems, I will in time be looking for a M1 dual plane intake for the little bit of performance increase. I like how my performer works, I just want to be able to use this air grabber air cleaner. It seems that the M1 will be the closest in performance. What years of the M1 are what I would need? Is there a specific part number that refers to the correct one?