A replacement shortblock for the original engine would be over $3,000. Our conversion kits include a drive adapter on the flywheel to bolt your pulley onto. Please check your muffler style before ordering any kit. We wire these up to match the factory original four prong connector. The plate to mount the electric clutch to will work whether you have a brake on it or not. These kits include a new throttle and choke cable. The kits also include a mounting plate that you bolt down to your existing holes to raise the engine up to the required height. A new oil drain and tube comes with this to make it easy to change your oil.