A Body Aftermarket Tach Size

Thanks for the feedback. I cant bring myself to spend $240 plus shipping/duty, etc. for a factory tach from year one or the other chinese ones out there, and ebay has nothing that i'm willing to risk spending money on. So.....went with this. Should be in in a couple of days and i'll be sure to post a pic of the completion.
I went this route after viewing this thread where i think this 3 3/8 tach looks fantastic.

http://www.forabodiesonly.com/mopar/showthread.php?t=175614&highlight=Tach+gauge