[Old Guy with 87 GT]

try mustang parts specialties... www.stangparts.com they have alot of used stuff .........there's alot involved .......wire harness change and computer...i believe the wire harness would be different for a 4 clinder,you would have to change it out ,plus you would have to get all the sencors and variose stuff to house sencores........you would need an efi distributer.......you would have to get the schematics for the vacume and emissions systemand a few varios vacume controls to operate egr and smog controls......you would have to get the entire intake upper and lower,injectors,egr,and thottle body............now to put this moter in a 4cl car theres alot more stuff you need there as well.......complete exaust,crossmember ,moter mounts,and radiator

as for transmission .....alot of guy's use the c4

well hope i was helpful to give you a genral idea of what you will need .......i'm sure i left out some stuff ....i'm far from expert......start combing junk yards and salvage yards.....it might be easier to find a v8 efi car thats wrecked or junked to get the harness and varios efi parts....heck it might be easier to use the car

well good luck.........