I think these 1500's are already maxed out in stock form... you might want to start looking at a 2500 with all the upgrades youve done. 1500 just cant RELIABLY handle big wheels and power in a daily driver... all those mods put a ton of stress on the parts you upgraded too from stock.. 1500 trucks are best left alone in stock form for daily drivers.
2500 GASSER has all the upgrade you want to start out with from a modding platform
1st upgrade I would do before spending any money on hard parts is reducing coolant temps, much lower than emmissions specs, you want your rad to operate close to 170 F , big wheels power adders, 160F..
get your trans to operate as cool as possible also