yes they are a little larger than the 1400s i will see if i can post a picture of the comparison between the two. I made them fit the champion GN1R heads exactly. I figured no use going bigger than this. Yes we are going to make intake gaskets, we will probably start with a simple valley pan that does not have port gaskets on it so you can run the felpro 1200 intakes gaskets and not suck oil into the PCV. then we will make intake gaskets. any recomendations on the intake gaskets would be appreciated.