Additional Drilling Equipment - National Oilwell Varco hydraulic torque converter. This unit is believed to be in good operating condition. Model number is C-300-64. Includes all flywheel attachments and adapters required to couple this to a 3500 series Caterpillar engine. This one was running on a 760HP Cat 3508. I have 3 of these units available. Please call me at 573-820-0205 for more information. Located in Dexter, Missouri 63841. Location: Dexter, Missouri. For complete listing information please select the Click To Bid button to see this item on eBay.