I believe it's a small journal crank. its in the block right now. The guy I bought it from seemed to know what he was doing, but I'm not assuming anything haha. I haven't had a chance to check numbers or measure anything on the crank because the block is off the stand and the crank is inaccessible right now. but I'll make sure when I take a look at everything on the weekend. does the fact that it fits in the block mean it will work?