Let's see, if I got you right. You have got an engine block from en ETA. From which car did it came from? 122 HP is the one, you will need. But the engine you are trying to build would not be far better performing than an average 325. By grinding this much, you will need an adjustable camshaft-wheel as well. Maybe you can have a look here: http://wp1016621.wp027.webpack.hosteurope.de/fotost/f00080/f00080.htm If you don't understand it correctly, I can help you translate the important parts. Cheers from germany