158 is the old short-life version of 194.
158: 3.4w, 2 candlepower, 500 hours
194: 3.8w, 2 candlepower, 2500 hours
The '65 I owned, and I'm pretty sure all the '65s I took apart over the years, used the metal bayonet-base bulbs (53, 53x, 57, 1891, 1893, 1895…) in the dashboard. '66s definitely...