Don't feel installing a thermal block in the alt circuit is a bad thing. Replaced the instrument cluster on the 65 but did not get around to connecting the alt gauge for few yrs. Concerned about that much amps going to the instrument panel and was not sure how to hook it up. FTE member made a drawing and emailed a copy of the circuit, took a matter of couple hours to install. Moved a wire to one side of a fuse box and the other side of the fuse block to the alt gauge, works great.