The 200R4 is smaller then the 700R4, 727, and 904. This means you can install the 200R4 without have to cut the tranny tunnel (only mod need so far is extending the transmission mount, the bolt in one to the car, closer to the engine). However the 700R4 (are really expensive to rebuild) is much like the 727 and needs more horsepower to power then the 200R4. The 200R4 is like the 904 takes much less hp to power but needs to be built up internally to take a bunch of horsepower. I've personnaly seen/know of a 87 Grand National that has 1300HP drag car with a 200R4 (which has been built up) and live quite nicely in that car. Plus the 700R4 is bigger then the 200R4 and would need tranny tunnel cutting inorder to make it fit and at that point, you might as well find a new wrecked Camaro SS, pull the 6-speed Auto (or 6 speed manual) and install it. The 200R4 is a great way to gain an overdrive tranny/gear without doing tranny tunnel surgery.
