Those lights will help. Do they get very warm?
Thanks Kenny, a valid point, so before I install these, I did one final test. I removed the bridge rectifer that was supplying the +12 volts to the 1156's and fed straight 13.4 VAC to them. This would be the maximum the tractor can supply to these lamps, and the most heat that they could generate. I cliped a meat thermonitor below the 1156 and let it run fir 15 minuets or so. looks like around 125 degrees, then to find the 1156 max temp I placed the probe on top of the bulb, looks like 150 degrees. For the full 30 minuets of testing I could place my fingers on the led heat sinks, they were only warm (from the 1165) mostly. I think this will work fine.
I am impressed with my camera at how well it filtered the brightness and glare from the direct pictures of the lit bulbs. I am still seeing spots from the brightness.