Now that I have the 7" driven mounted (ebay parts never fit out the box) I have the 6 13/16" center to center. Just so I'm correct I should go 1 belt size above to compensate for the bronze bushing? Come on guys I know this has been done before, can someone explain why belt 994-80 is 1/8 too short when that's the belt called for? Trying not to order the wrong belt.