If you are willing to let go of the tall tires , that will help , you can add a little power for little or no $$$ , but you'll gain by just getting closer to stock tires , these trucks are detuned as it is then put tall tires on and now you have even less , depending on auto. or man. and need of built trans. or good clutch , once you have those taken care of then if you want put the big tires back on and then build big HPs , but until then ,timing to about 16 , fuel plate forward , star wheel , intake , exhaust .