I have a 4R in a 93 LX,460. I like it but....You have to shell out $1600 for some kind of adapter and a controller before you even start thinking about the transmission.Not going to lie to ya,if you're not real tech savvy,sorting the controller out can be a problem. It's amazing what they can do if you know how. I didn't,finally got mine sorted out with help. I sorta wished I would have gone with AOD.You can make them handle big power but the lock up feature isn't as good, Low 4R gears will work in an AOD but not needed in my case. The C6 is a good tranny but like you,hate the screaming motor at low speed. You will drive the car a lot more with OD.