Thinking of doing the same. I gave my mechanic a deposit to order an art carr 750 hp capable 200-4r. Not sure if i made the right decision, going from a 5 speed. I think ill miss rowing gears. From my understanding, there are ways to lockout certain torque converters manually, with a switch. Most builders just use an auto locking TC. Many builders recommend non-locking TC's. A shifter to manually shift, has nothing to do with locking out the TC. most do it by themselves. TC lockout helps it run cooler and runs more efficiently. Saves gas, less loss of HP, reduces the need for an oil cooler. A lot of high HP racing guys use non-lockout converters because they're more reliable and can handle more power. Manually shifting the gears requires a manual valve body. I can be wrong on some of these statements, as i am a manual guy most my life.
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