Tach Question

[GSFuqua1@aol.com]

I ran into a stumper today.  I am working on a 64 BJ8 which appears to have 
the correct motor.  It has a cable drive coming off the distributor post for 
the tach but the tach that is in the car is electronic. i.e. no cable 
connection 
and it appears to have the correct face, etc..  Did the early model BJ8's 
have mechanical or electronic tachs? i.e. which is wrong, tach or distributor & 
post?

Many thanks, 

Gary Fuqua
Branson, MO