check this one out from summit racing
0-3000 rpm and electrical hookup.
my old 1957 TO-35 with generator tach drive, some day I would like to switch it over to a alternator
when I do this, I will lose my tach drive as I do not want to pay the extra for the alternator tach drive
the hr meter on my original fergy tach does not work, but the rpm's still works.
this tach appears to fit in the hole and would hook up to the coil or distributor.
may be what I go to someday.