Quote from Deleted user on June 30, 2019, 6:52 pm

Quote from getbent on June 30, 2019, 11:09 am

So i tapped the blue wire on the positive battery post and the RPM jumped up to 175 then back to 0 when i stopped. But i also found out the my alternator was only a 50A one wire. I have swapped it out for a 100A. i am going to be reinstalling that fitech and giving it a shot to see what happens.

Good to hear the unit is registering RPM.  Now we have some direction.

I had a 75 amp on my 67 C10 at first.  Burnt it up within a few days of using the Fitech with MSD box and coil. Many will say you don't need much alternator, but it doesn't cost much for a 100+ amps.