My truck has a 351W with a ZF S5-42 4x4 trans. I have replaced the timing chain, clutch, starter, and the alternator Has been replaced twice. I am wanting to know what I can do to max out the general performance of my truck. I have been having a few problems with the engine at idle speed. When...

I own a '90 f250 ext cab long box. It has a 5.8L with a 5-speed standard tranny. I have had this truck for a few years now, and since I finally have the time and money I have decided to fix it up. After I found out what powertrain it has, it made it worth it. I need to know what exactly what...