I'd like to install a tach in my '57 3600. Here's my situation: It's quite original looking inside with an original, working, AM radio. The only thing that is slightly unoriginal are the chrome knobs for all the stuff. AND I don't want to spend alot of $$$$. I simply want to know what kind of r's I'm turning. Any suggestions on a small, tasteful (and el cheapo) unit???? And where would y'all recommend mounting it so that it doesn't look odd and out of place. Thanks all. Yer the best!!!