Would a Sun tach II be correct for 1971, or did they come out later than that?

 

I think the Sun Super Tach was in the 60's and used a transmitter box. The Super Tach II came out in the late 70's and was self contained. I think it would be period correct for your car.

 

I put one in my 70 Supreme back in 1981.

 

yeah i recall putting a super tach 2 on my truck in the early 80s so i would guess the super tach would be more appropo for a 71. I have a nice super tach thats all metal not plastic ill try to remember to post a pic of it...its actually pretty cool.