I like the MaxiF2 Kiy proper nice... but i dont u nderstand why you want to fit a cosse floorpan and engine??? Ideally if you really wanted to do this, it should be done at the same time as the kit....
IMO you would be better off spending your money on a nice duratec/zetec turbo conversion, 400 ponies much quicker than a stg III 4x4 Cos