The 2747 HD Hayden clutch is 3.34" high. So, you'd have about 7/16" clearance from the radiator with it. A little tight, but it may work if you limit the engine's forward movement. You wouldn't want that thing touching under hard braking. On the other hand, some folks use the 2765 Jag style clutch. That one is only 2.67" high. The only problem with that one is it's the standard duty clutch not designed to spin the heavier steel fan as Jags had plastic fans. Contact Hayden and they may be able to send you a prototype with the 2747 HD clutch and shorter 2765 shaft. Best of both worlds.
