Hey guys. I would like another gear but don't know what that will accomplish. Currently have a 400 stock engine w/ 067 heads 3 speed manual tranny and 355 rear gears. rear wheels are 24" tall.It is mostly for in town crusin. Twice a year its a fifteen mile cruise to a local car show.I like how it gets up and goes in 3rd or 2nd but!!! crusin in 3rd gets loud and old. Anyone have a decent suggestion on a close or wide ratio 4 speed? I dont have a clue.