I have a set of aluminum chevy manifolds for a big block chevy model #12553838 and 12553839 that have had 2 bolt holes repaired and all surfaces machined by a machinist with 50 plus years of experience. Parts where dropped off and never picked up after repairs. These are very clean and in great shape, not many of these floating around. This pair where matched up from the initial installation. Looking for sale to cover repair and machining.!!!!!!!!!! Thanks for looking. SHIPPING FOR THESE ITEMS IS FREEEEEEE!!!!!!!!!!!!!!!!! Listing was wrong on shipping! I will ship them anywhere in the United States, sorry about the shipping snafu!