1 step colder spark plugs you probably use 8s so 7s. Fully synthetic motor oil, Yes your car may get hot or it may not, use good quality radiator fluid, and the cars that do overheat often one of their fans is not workin make sure yours do. A new clutch will be essential. Not to sure about the check valves but most people use them I think. Oh abd a decent sized exhaust would be nice to. 2.5 or 3 inch is best mandrel bent. Good luck