Max RPM

I have been doing a bit of back country road "driving" and like a car that has a wide RPM & power band. Getting out of a tight turn and heading to the next I don't want to have to change gears very often. I plan on a 5 or 6 sp manual as well. I have a Z4 and have a ball "Canyon carving" in it. I would like to do this in my 68 Barracuda as well. That is why I wonder about having a higher RPM capability.