Overdrive Options

Say i find one of the so called 200R4. What mods does the trans need to have to withstand more HP??? Do i need to find a performance trans shop or is this something i can do myself; Is there floor pan surgery to do with the 200R4???

Thanks.............................. PETE ..............................................

You can build it yourself with ordering the correct parts or you can have a trusted tranny shop do it. There is not floor cutting, just on cut on the brace under the car.