Ford F-250 Tune-up

I Am Trying To Figure Out How Do Give My Truck A Tune Up..it's A 2000 F250 Super Duty V10

Replaced Plugs,cap,rotor,wires,air Filter, Drained Fuel From Front Tank As Much As Could(only 1 That Work Now) Added Fresh Fuel And Seafoam...

Engine Mechanical Problem 1995 Ford F250 V8 Four Wheel Drive Manual 80k Miles A Complete Tune Up Involves What ? Besides , Oil Change...

Engine Performance Problem 1991 Ford F250 V8 Four Wheel Drive Manual Need Plug Gap, Timing Degree, Etc.... Would So Much Appreciate...

I Recently Performed A Tune-up On My Truck. It Is A 390 Ci V8. I Put New Points, Plugs, Condenser, Rotor, Cap And Plug Wires On. It Still...