If 289 is to original Gt350 as supercharged 5.0 modular is to modern day GT350 and 428FE is to original GT500 as Supercharged 5.4L Modular motor is to current GT500, then one must conclude that it is only logical to use a 5.4L supercharged Shelby Modular engine in a 427 bodied Kirkham, if a mod motor is so desired.
