Like Frank, I THINK some of the Ford heavy duty truck applications with the y-block used a mechanical tach drive distributor.
I've been told '57 Mercury Turnpike Cruiser, too. Fuzzy on this, think you have to change the distributor gear. Need 14 teeth.
IF you look at the o.e.m. '55 - '57 'Bird distributors, stay away from the '55 and '56 units. -They are vacuum controlled advance only units. You want a '57 which is the combination centrifugal and vacuum advance. -Likely some $400...
I THINK Prestige Thunderbird is selling new Mallory point distributors with the mechanical tach drive.
Hope these leads help.
NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York