just bought a nice shortbed stepside chevy. it has a 6" softride lift with single shocks, rolls on 36/14.50/16.5 mickeys.truck runs good, but doesn't drive to good. it has a shimmy to it. also it wanders some .it only has a stock single steering stabilizer on it now. what can i do to straighten this out. what should i check first? rims are either aluminum alcolas or mickeys not sure. any input? thanks grovey