M50B25 2.5 liter E36 in E21 coupe
M20B23 2.3 liter E21 Baur
Alpina, my english is weak, sometimes i can understand anotherthing that you are asking for - sorry.
I bought my Baur in Rochford Essex, on Ebay

The M20b23 is now incomplete, i need few things to complete it (some rubbers, K-jet etc)
I'am a big admirer of original condition. I have E24 635csi, only modifications are lower springs and BBS RS, also i have E30 Baur - without any modifications - this cars i'am using occasionally.
E21 Baur purchase was unplanned. My friend repaired in my garage his e21 with m50b25. I asked him about selling. He said that in few months he probably will sell it. He lives in Ireland, but his girl lives in Poland, like me. Few weeks ago he said he sold me his BMW, and I started to search new body, becaude his one have much rust. Fortunatelly I found E21 Baur on Ebay and I won her

. While I was waiting for shipping i was thinking about engine - which one? Original or SWAP... I deicide: original! Then my friend comes to Poland, and we was talking about his E21, I said that propably i will leave original engine... He said: You can try to drive my E21, with LSD... and I just tried..

and I fall in love!
I think, when I finish this project (about may 2009) I will restore M20B23 and I will put this engine back to E21 Baur and i will buy another E21 coupe and i will put M50 in.
Sorry for textual errors.