I have dart iron eagle platinum heads. 215cc runners. I just realized that my 1 5/8" headers seem to be smaller then the ports. (I cant measure exactly because the headers are still in the car while other engine is being built). Also they are round tubes and the heads a squareish. I measured the outside of tubes, and the seem to stretch diagonally on the square perfect, so the inside diameter must overlap alittle bit. Think this will be a problem?