Need some help here from some old timers and/or mechanics. I have stumbled across what I think is a NRTO 335. Small bore, 262 with a large oil cooler & oil cooled pistons. 64 stamped on the block. I have heard of these throughout my 47 years in trucking but have never seen one until today. Anyones thoughts or expertise will be appreciated.
Vintage Cummins Engines
Discussion in 'Trucks [ Eighteen Wheelers ]' started by truckdad, Aug 4, 2015.