Will the 4.6/liter fit in place of 4.2/liter in a1998 ford/f-150 truck
Nop sure won't tranny doesn't interchange and wiring harness is diff and ECM
The engine might fit in the engine bay with some adjustments, but the transmission might give you a problem. Another problem will be the wiring because it is different. Talk to a mechanic or a Ford dealer for professional advice.