T = Tonawanda 01 = January 31 = 31st V = FC application, most likely 145 cid because every 164-cid van FC engine I've ever seen has had an A or B suffix after the V. --Bob On 9/18/2013 2:37 PM, Michael Kovacs wrote: > T0131V > > I know it means a Tonawanda engine and the V probably means 95 HP van . What does the 0131 mean?