A bit more detail; 451.6 ft lbs torque @ 3600 rpm 380.0 hp @ 4900 rpm
After putting in the 3.55 gears last year, I wasn't happy with the high rpm I was getting on the highway (TH350 trans).
I installed a 200R4 overdrive and it seems like the perfect fit for the driving I want to do. The 200R4 bolts right in and I picked up a shifter kit from Shift Works. The kit includes the detent and plastic plate for the console. The console still looks stock. The plastic plate (including OD) replaces the stock one.
...still a good 1st gear ratio (actually slightly better than the TH350) and the option of clicking it into overdrive on the highway. I'm running about 2200 rpms at 65-70 mph.