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Hei with factory 1971 tach

2K views 6 replies 5 participants last post by  srotn 
#1 ·
just went thru a sweep to ss gauge dash swap. It all worked the first time (well almost) when i powerwd it up. i have a new "american auto wire" harness through out the entire car. the quetion is, will the factory tach work with HEI. i have hooked everything up correctly, i have a complete circut from dist. to back of tach. the tach willl not work. do i have to have the tach upgraded or does it need repair?
 
#4 ·
I have had an original tach & a reproduction OER tach both work in my 70 with HEI just by plugging the wire to the HEI tach terminal.


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