I could tell you however the post would be pages long. To keep it short Nick Arias and Alan Root (backed by Alan's parents) were partners in A/R, Inc. they had the Ford part numbers for their Boss 429 thanks in part to help from Ed Lyons (who worked at FORD SVO) and Mike Kranefuss (the head of Ford's Motorsports division). When Nick and Alan couldn't get along they split - allegedly Bob bought out Nicks share of the business. Larry Widmer of Enydn went to the foundry and spent several days scraping the green sand molds/cavity to produce his high swirl lean flow cylinder heads that Bob and only Bod had access to. I am aware of this as an insider since I was under contract to assist with developing the engine for the fuel classes. However after less than six months Alan and I couldn't get along due to delays in shipping product and product failure. It was at this time that I purchased the full race and street version blueprints, patterns and molds that Nick had. Alan and Bob didn't want them because they deemed them of no value to them. I went on the expand the product line to over 300 propriety parts prior to receiving a cease and desist letter from FORD. That's another story in itself. My inventory, blueprints, patterns and molds ended up with Carroll Carter at C&C Machine and are now referred to as the Roberts patterns after the person who originally made them for Nick and Alan. Research Larry and Endyn the articles are a good read.