This is a mostly stock F150 that was purchased with economy in mind, both in initial and maintenance costs and fuel economy.
None, currently almost got it restored to stock running condition. The truck was almost junk yard ready when I bought it. Have rebuilt electrical system, ignition system, smog system, engine and rear end.
Switching M5R2 5 speed transmission to the ZF S5-42 wide ratio 5 speed transmission (has higher numerical 1st gear and lower numerical overdrive). New drive shaft u-joints. Vacuum gauge. Scanning tool. Front air dam. Will possibly lower suspension depending on what other mods yield, but would like to keep the already lower 2wd ground clearance where it is. I need to use this off road on occasion. May also consider hinged side skirts and/or belly pan and/or partially blocked out grill. May also return current 31" tires to stock P235/75R15 to reduce rotating mass and lower stance some.