You'll get no argument here.
Factory stock LS1 vs Factory stock 5.0/4.6, considering equal driving talents, the LS1 will beat any current production Ford Mustang (except R), and every production Ford Mustang back till 1970.
Tough to say what the old motors can do, but, the 428 Mach1's trap higher than the LS1, according to old tests, plus they have more low end.
I really, really need to get my Uncle to dyno his.
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