Fuel classes have been HEMI based just about all my life... I don't care if it's an aftermarket piece (starting way back with the Donovan 417), it's still based on a Chrysler HEMI...
And don't start me on Harley Davidson...There is not one single H-D part on that thing (it's a bike pretending to be H-D based)... Whereas the 4cylinder based engines I believe still have to use a stock head casting, WTF?
