You couldn't have much cheaper alternatives and gain horsepower.. I've never tried this but a spitball idea would be to put a scope down your spark plug hole and drive your piston up to top dead center first LOL.. and take a look the Piston the design and maybe how high it comes up? Maybe a cam change for someone like yourself mechanically inclined should be relatively easy. When you take the cam out you can have it looked at and make your cam Choice from there. The cam and lifters is not very expensive if you look in the right places.. just spitballing..