Hey Stefan , thnaks, my english is not good as well! I has been told that the S50 crank can be used in our M20s, I know the DIeseland ETA crank is direct fit , but is not so common here. That's why the I'm trying to get info on that, since is available a S50 crank here in shop froma blown engine. There are some companis in US that sell stroker kit's from 2.7, 2.8 , 2.9 & 3.0L the 2.9 & 3.0L uses the S50 crank but modified and that's what I would like to know since those companies won't give any info of corse and I won't pay their prices also. I'm budget! Greetings from peru Munich Deutschland!!! Later Diego PS: Will read right now that article and will ask my mother to translate it since she knows speak german, her parents are from germany;-)