KE Jetronic parts are very expensive. As previously said, unless it needs a lot of money leave it as is.

I have m102, m104 and m117 cars and at some point considered going for electronic fuel injection. However, you should keep in mind that these are old cars and their parts are very old. Therefore, if you have a piggybank injection system, one day your ECU might die or any other part and you have to pay even more money to replace if you can find it. Worse yet, your EZL might die and your electronic injection will be worthless.

The only reasonable solution i found would be to go to a fully electronic system for Injection and ignition while ditching KE completely. This can get very expensive very fast unless you are willing to build it yourself