All, TCI Automotive provides the technical information you are looking for and a group of calculators to help you determine which speedometer gears are needed for your application.

In the 350 application you will need a drive gear, a driven gear, Drive gear clip, and a driven gear housing (which you should already have). All this should be less that $30 new from TCI. Check out the following link.

go to http://www.tciauto.com/tech_info/speedo_gears.htm


jc