Sun Tach RC-85 Documentation

[68 DANA]

Searching for Sun Tach literature to differentiate the difference in the appearance of the Sun Tach model RC-85 for the 67, 68, 69 and 70 model year.

Thanks

[66SS427]

I looked through every page I have, but no luck. Sorry.
I never tinkered with these models.
Hope this helps though !!!!
Good Luck with your search !!!!!
I did Google "Sun RC Tachometer" and found lots of articles and info.

Here's a couple of samples,
http://67-72chevytrucks.com/vboard/showthread.php?t=392461
http://www.bobsspeedometer.com/1/120/news.asp?artID=43376
https://www.jalopyjournal.com/forum/threads/sun-tachometer-rc-70-tachometer.1030481/
https://picclick.com/Used-Vintage-Sun-Tachometer-Model-RC-85-0-50-391601544109.html