I'm planning to do the swap soon.
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this is the list i have gathered both by looking in magazines and around the corral
change from 4cyl to 5.0....
tranny
motor and all v8 components (obviously..)
all exhaust components (obviously..)
v8 motor mounts
change the tach
master cylinder, brake booster
suspension
brakes
fuel lines
fuel pump ???
brake lines - on the 4cyl the brake lines are dangerously close to the exhaust pipe
passenger side exhaust hanger
power steering pump - not mandetory, but the v8 one is better
rad
front and rear sway bars
vacuum distributer (vacuum tree or whatever)
the v8 has a thing in the passenger fender wall to store extra vacuum along with the regular vacuum ball
throttle cable
MAP sensor
the gas pedals that came with the 5.0's are bigger as well.
rear end
5sp drive shafts are the same in the 4cyl and v8, so i have been told
electrical, you have to have the engine harness' from a 5.0, the rest hooks right up except you have to extend the alternator wire because its on the drivers side with a 4cyl, and the passenger side on the v8.
double hump tranny cross member
gas tanks are the same, K members are the same
and ofcourse 5.0 badges
anything i have missed.. throw it in
anything i have screwed up on, correct it.
with my swap, i am using the whole chassis, dash, and engine harness from a 5.0 so it won't be nearly as difficult. but the regular swap shouldnt be too bad anyways.