Engine options from FE Specialties.....
http://www.fespecialties.com/HTML/EngPackage.html
390 570 HP $8,995
428 635 HP 12,495 Add $3k for an Aluminum Block
427 SO 680 HP $15,495
They all look exactly alike from the top !!!!!!!!!!
Any of these will fry the tires in a light weight Cobra, pick your poison, $6,500 difference top to bottom.
Tony R.