Not sure what chassis that is; if it's EDGE, you'll need a 74t chain. If the ratio is what you're looking for, that's a great combination on EDGE sleds: very little dogleg. The spacing between the driveshaft and jackshaft on those is 7.92," so you can tell what you've got by measuring between those (just make sure you're going centerline to centerline). I'm seeing two other spacings listed in the manual I have: 6.625" and 7.05." I'm guessing those are for the old Indy chassis and Gen II, respectively, but not sure. Either way, they call for a 68t (6.625 spacing) or 70t (7.05 spacing).