Converting '68 120 mph Rallye Speedo to 150 mph

I called Precision Graphics about updating and restoring my dash and possibly changing my speedo over to the 150 mph version, as the car will soon be much faster than it is currently. He referred me over to Thomas at Instrumen-Specialties over on the right coast.

Thomas told me it was no problem at all to convert the 120 speedo to a 150 speedo, but that it just wouldn't have the trip meter or reset mechanism in it. I don't care about that detail.

I also want my amp gauge converted to a volt meter. They can do that as well with either the stock amp gauge face or a volt gauge face. I'll go for the volt gauge face, and have him test and update my remaining factory gauges. I had the clock done years ago and it still keeps perfect time.

I'll also have him restore the entire plastic gauge panels and polish the lens, glove box panel etc. I have a dash cap in the top pad now and my lower is still in great condition.

Those real 150 mph speedos or complete Rallye gauge sets for the '68's are very hard to find!