Type 4 engines I can use??

[Cyrus2Dope]

I have available a 1983 type 4 engine with fuel injection (planned on ditching the injection) and i was curious if this type of engine was usable to convert to an upright and throw into my 66 bus. I have been told that it is not wise to use that engine, but the adviser was not to sure. Does any one have an answer to my ordeal, if this engine is not usable, what kind of t-4 2.0 liters are usable?