You might want to try to get in touch with Ken Dollar about the fuel shut-off. Anything is possible, but I've been doing this a long time and I've never heard of any carbed engine requiring a fuel shut-off. I don't have one in either of our 8 second blown alky Placecraft's and SDBA and IHBA has never said a word about it. I don't believe blower restraints are required in any blown gas category either. Maybe I'm wrong, but it sounds like who ever you talked to has no idea. Never heard of anyone using a neutral device that can be engaged whenever either. According to how fast you run, assuming you are running in the Lake Racer classes, a lot of the things you mentioned are not required. I asked before, but don't remember if you told me,but, any idea what your boat runs, E.T. or MPH. If you have good reliable MPH data(GOOD RELIABLE) I can possibly give you some idea what to expect E.T. wise. I hope you don't have the same symptoms that every Liberator owner who ever comes down to this river has. For some reason, they all believe, at least around here, that a box stock 365 horse 454 in a 650 pound 19' Liberator will run 100+ MPH. Used to couldn't wait every weekend to pounce on one of them and embarass them with a tried and true 88 MPH TX-19, as per SDBA clocks. Not saying that about you, but that is what I'm used to here. Guess it's because we are so close to Liberator's manufacturing facility. I don't mind trying to help you out or get some answers for you if you want. My direct email is snowman069@hotmail.com or my business number is 254-889-3336.