I would only attempt this if I were restoring a wrecked 09 GT. Also, if the 6th gear were overdrive to where the RPM's drop down to that of the automatics or even a bit lower. I feel the current 5th gear should have been machined to optimize fuel efficiency and lower it's RPM's. On a plus side though, no matter what gear I'm in and no matter what speed I'm at, This little car gets up & goes without much struggle or hesitation

I can't say that about my 5-speed manual in my 1992 F-150. There, if I slow down too much, I absolutely MUST downshift to a lower gear or I'm not going anywhere
