The judging Manual for 1966 states flat rear plate on the BB water pump. I understand for 1966 that 427's used the 3856284 water pump with the crimped or flange backing plate and large pan head screws. 1965 396's used the 3856284 water pump with the flat backing plate and large pan head screws. Some of the very early 1966 427' water pumps may have the flat backing plate left over from 396 engine production.
Do you agree with this premise ?
Do you agree with this premise ?
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