What were the warranty periods and mileage for the 440 engines over the years of fitment? It seems that the standard and the HP 440's had a 5-year/50,000 mile warranty but not the 426 Hemi or the '69 440 A12 cars. I know the 1969 A12 3X2 Lift-Off-Hood cars had a limited 12-month or 12,000 miles with a special sticker placed in the owner's manual stating the "Same as the 426 Hemi engine" but did 1970/1971 440+6 engine equipped cars also limit the warranty to 12 month/12,000 miles ?? Would dual quads or 3X2 carburetors really make a reliability issue by 4-years and 38,000 miles......maybe down a drag strip at a quarter mile at a time all day and night long. Just can't see the carbs being a warranty period issue. What am I missing?