Im racing a SP with a 12 hp b/s, about 4500 rpm on a 1/8 mile oval,can any one give me advice on camshafts? would precision be able to work with me over the phone enough to get what i want,also regarding ARCS new brass syncro substitute crank weights,Has anyone noticed a power advantage yet,in rpm response? had a guy remove counter weights last year and try to ballance out the crank,spun up like crazy but could never get it balanced enough to keep the tin on the thing, i asume the brass weight are ballanced out good?