I am looking for a Hemco plenum. I have a Keith Mease tig welded upper plenum. It has the AIT sensor hole tapped into the back along with vacuum ports. These aren't made anymore and it just doesnt quite look right with my set-up. It is a .70 or .72??? Let me know. If it is not taken soon it goes off to ebay. Pictures available for those serious! Not those window shopping......