buying a hydramatic out of a 52 caddy, buyer isnt quite sure if its a single or dual range. His description makes it sounds like a single so I'm having him check the data tag for me. I know the early 52 lincolns ran singles with the laters running duals. the dual on the hydramatic from my lincoln says L52. So I'm wondering, if his says 52 anything would that be a dual? if the caddy's where a split year in 52 also maybe they where just getting rid of old stock so it could be a 51 code making it a single range?