Wagoneer,
Have you tried one of the Nova sites?
http://www.stevesnovasite.com/index.phpFWIW:
On my 64 CHEVELLE I used a VDO Series 1 Tachometer 333355.
(Looks like it belongs, is 3 3/8", and has a realistic 0-7000 rpm range.)
http://www.summitracing.com/parts/vdo-333355/applications/I had an extra dash which made cobbling the mount easy so it was just a matter of slipping it into the clock hole.
Pete