My son has bought a 94 325i e36 M50 Vanos automatic convertible with a blown engine. He has found a low mileage engine from a 92 325i e36 M50 non-Vanos with a manual transmission. For right now we just want to swap the engines and keep the automatic transmission. Will I have any problems? Shouldn't I be able to swap engine for engine and keep the existing wire harness and automatic transmission from the 94?

As a bonus the replacement non-vanos engine has the entire wire harness along with the DME if it is possible to swap out the wiring harness but then again the wiring harness for an automatic or manual might be different?

Let me know

Thanks
Ken