Tach Installation

[LJ-TJ]

I just purchased a used Auto meter 3-3/8 tach part number 3991 and was interested if there's anything I should look out for when hooking it up with the electronic ignition. Or better yet how do I hook it up with the electronic ignition? Thanks Hm?

[LJ-TJ]

Nuts forgot here's the tach

[DaveVA78Chieftain]

Coil "-" hookup

http://www.autometer.com/download_instruction/237j.pdf

[liquidwrench63]

what kind of ignition chevy dodge ??

[LJ-TJ]

Ooooops sorry. It's a 1975 Winnebago on a Dodge Chassis. Hm?