Dakota Digital
SGI-8 Tachometer Interface
http://www.dakotadigital.com/index.c...rod/prd127.htm
Do-it yourself articles, the problem is, different years use different capacitor values.
http://www.s10forum.com/forum/f62/ho...-heavy-481326/
http://www.chevytalk.org/fusionbb/pr...php?tid/56905/
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