fastfireman

i just acquired a 98 mustang 3.8 lt. i want to change it to a 4.6 but need some input on what im going to have to change with the motor. i think it has the t-5 tranny ( its a 5 speed ) some one told me it would bolt right up. the other concern i have does it have to be a mustang 4.6 or can i use anyone like out of a police car or Lincon are all the electrical plugs the same. any suggestions would be welcome

MU71L4710N

you will have to swap out the motor, ecu and wiring harness, your rear end (the 7.5 isnt strong enuff unless you forged it), and i think the bellhousing on the tranny. you will also need stronger front springs, maybe the GT radiator, etc...

there is a LOT involved. it typically is not worth the swap unless you can find a donor car (a wrecked mustang GT which still has all or atleast most of the above parts salvagable)

NinjaMonky

DON'T DO IT!!!! 2v 4.6s = Fail.... lol get at least a 5.4, but if affordable get a bored stroked 5.4 3v that'd be bad ***!

school boy

+1 ^
and if you like tinkering on cars. if its a project car, go for it

TCStangerv6

I did this swap and dont regret a thing i think my 400 hp 2v 4.6 is just fine here is a link to the swap. https://mustangforums.com/forum/v6-1...ld-thread.html. if you have any questions just ask me. all togther the swap coast 2,600 and with the s/c the final coast was only 4,200.

MU71L4710N

a 5.4 is a stroked 4.6 essentially. i wouldnt stroke a 5.4L if there even is an option for it.

you are now going from a cheap under 1000$ 4.6 motor to well over 5,000$

fastfireman

wow that sounds way to involved for me to get into ill just save some money and buy a used roush or something save the 6 cyl for my daughter i found a used 09 roush for 26,000 i think thats a better deal

uberstang1

Someone correct me if I'm wrong. I beleive the 3.8 k-member will work when dropping in a 5.0, but don't you need a k-member out of a 4.6 vehicle to convert a 3.8 over to a mod motor?