You might be able to get away with it if you use a high heat gasket sealant in between the gaskets and let them set and cure together to turn it into one gasket and then a light amount of that sealant on the bottom and top of the new 2 in one gasket you just made so it seals on both surfaces it will adhere to...I did this once when I had to on one one of my motors some years back and it worked just fine for me...It never leaked.