Aftermarket tach

I''m thinking of putting a tach on my 92' Ram 150 / 318 mag (didn't come with one) How hard is it to install?

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.