The ‘73-‘77 “A” body 8.5” will be your best bet in fitting your ‘72 LeMans. The guys at Moser told me a properly built 8.5” cam handle 500 ft/lbs of torque easily, which is good since a mild 455 can generate in excess of 500 ft/lbs.
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“It takes considerable knowledge just to realize the extent of your own ignorance.”
Dr. Thomas Sowell
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