Thanks for the suggestions. The only reason I asked, was that it seemed like they were not equally spaced tapped holes. When I tried to put the cyclinder head on in a position other than the way its supposed to fit, it would not fit over the studs. Weird, but it looks like the studs have been replaced before, and somebody had to repair the threads the same way I did, and didn't do too hot of a job. Thanks again for the help. Another quick question...what are all of you using to torque down the 4 bolts that fasten the cylinder down to the crankcase. A box end wrench fits fine, but a socket doesn't fit so getting an accurate torque value is difficult. Friend of mine has a 14mm open end wrench that is cut about half way down the handle, and has a socket welded to the cut end. This works, but you need to lower the torque value on the wrench to counter the extra leverage of the wrench. What is everyone else using???