Below is a discussion about why bolts such as main bolts and head bolts are better than using studs. This is completely contrary to what I have heard for years. Even David Vizard as made comments in his book about using bolts over studs and is supported by Larry Meaux of MaxRace Software (PipeMax). Book titled "How To Build Chevrolet Small Block V8 Heads" By David Vizard Page 122 ( pages 117 to 123 ) Year = 1991 Motorsports International Powerpro Series I thought it would be beneficial to post the thread here for discussion. I will post a part of the thread every few days, it is still an active thread on the MaxRace forum and is starting on it's 3rd page now. The link is below, but you need to be an owner of his software to login and view the forum. Below is the thread from the MaxRace Software forum ......... http://maxracesoftware.com/bulletinboard/viewtopic.php?f=26&t=1431 t6nisson Writes: First, I apologize for my bad English. I try my best to be understandable for you. Also try to keep my questions short. The objective is to keep stock 440 bbm block alive around 900-1000hp. There seems to be no free information available for my questions. No budget for aftermarket block, but opportunity to machine parts on my own. So I am interested in main cap design for 2 bolt mains. Thinking 7075 aluminum? #1 BCR style aluminum main caps with girdle #2 Pro-gram style with cross bolting. Needs milling the already weak main webbing a little bit. #3 Dvorak style mains, needs milling lot of the webbing and thru side of the block and aluminum seems like a wrong idea for something like this? In dvorak website, they say "Will withstand 1500 plus horsepower" which is hard to believe. So.. What would you do? And also want to thank you Larry and all the others around here for all the information.