I am buying a 1973 Cherokee 6-260 and want to add all of the most effective speed mods. I have looked all of the ones from Laminar Flow, Knots 2 U, and Lopresti. If one wanted the ultimate set of mods for this model, which combination would they use. I am planning to paint it, so no problem about adding any of the various mods. I am coming out of a twin and want all of the speed I can get with the economy of a single and the load carrying ability of the twin. Actually the Cherokee has a bigger useful load than my Baron and with full fuel, a lot more payload. Any help or advice based on your experience will be a great help.