Question is....what engine won't go into an e28? If you are planning to spend over $3000 on this conversion, go for it! Put in the 4.4L V-8 motor. Same price! Much more ponies. I was wondering if it was possible to place an e36 M3 engine into my 1984 528e. I have seen a Bravaria with an e34 M5 engine and I have seen many e30s with e36 M3 engines. Any advice you have would be helpful.