The 200R4 works best with a real Monte SS valve body and matching governor for the 3.73 gear rearend. You can source an aftermarket shift kit and possibly a Turbo Buick servo. Both the 200R4 and 700R4 are dependent on the TV cable to be adjusted properly to work. The 200R4 will work just fine without the lock-up function where as the 700R4 must have the lock-up for the converter to lock between 45-50 MPH or it will have a short life.