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View Full Version : Switch from 4.2 to 5.4



whstanley
02-16-2012, 07:26 AM
Maybe some one can give me a heads up as to how hard is it to switch from 6 to 8 on a 97 F-150. I'm a heavy truck mechanic so I know my way around. I've had this truck for a while and need to make it go so I can give it to my son. Will I need a whole donor truck? Can I use existing dash harness? Anyone who has successfully performed this please reply. Also anyone in the East Texas/West Louisiana area who has a donor truck, please respond.

Raptor05121
02-16-2012, 04:31 PM
well they of course have to come from the same years (97 or 98). you need the ECU, harness, and engine. what type of trannie do you have?