How do we go about finding out if the motor is original if the dash plate is missing. Mine is a 1969 SRL311-12536 and the motor is U20-13295. Anyway to find out what the match was? Gary Lasater founding member www.wycroc.org '63 SPL310-300161C '63 SPL310-300289B '64 SPL310-001289 '68 SRL311-11977 '69 SRL311-12536 '70 SPL311-28169