[jp8819]

depending how much fuel you are pushing or what you are doing with the truck you could use a 62/65/14 if you prefer faster spool up down side it will be hotter when running it hard all out. My 62/71 is not bad and I tow with it you just have to remember with the 5spd you are going to lose all your boost between shifts so it will be slower spooling than your tow twins.