I replaced the CIS injection on my Porsche 928 with an Electromotive engine management system. However, I used the intake, throttle body, and 60 less 2 flywheel from a later model fuel injected 928. You will need to custom fab a throttle position sensor, crank position sensor and timing teeth on your crank, and have someone custom fab the mounting points for the fuel injectors as well as custom fuel rails, new injectors, MAP or MAF sensor, and ........ It will be waaaaay cheaper to replace what you have and may be even more dependable. I replaced mine because my CIS system would no longer support the hp in my new engine and did not give me enough flexibility for supercharging or further modifications.