I have been looking at Hayden Fan Clutches for my '69 383 roadrunner with A/C. What it the correct height fan clutch for this application? Height being from base to face of fan clutch. Can't determine whether I should be going with a Hayden 2747 clutch with an overall height of 3.34 or a 2765 with a 2.67 height.

Any insight would be appreciated!

Thanks

My 69 Sport Satellite 383 with A/C uses Mopar part#2658456.It is a thermal drive unit.Overall height is approximately 2 1/2 inches.1 1/4 inch from surface where the studs for the fan are to the surface where it mounts to the water pump.I would say the Hayden 2765 would be the closest.Cars with A/C generally use the shorter shaft fan clutch.Hope this helps.