Looking at options to make my ride a little more highway friendly. I'm running a TH 350 tranny and 9" ford with 411 ratio, and 15" wheels. These components came with car so I used them. It sure is fun for a 1/4 mile or stop light jumping, but not good on highway. I've looked into changing transmission to a 700R4 or 200R4, but started thinking I might accomplish what I need with new ring and pinion in a 3.50 or new gear ratio. I'm not looking to tour the U.S. in it, but would like to drive to some car shows out of town occasionally and cruise some highways. I see the gears for $150-$200, but don't know what a shop would charge to install them? This seems a more cost effective way to go. Any ideas or input on this is appreciated.