This conversion is a real rarity: a homemade LED conversion done right. The build thread (including detailed discussion of safety performance requirements, how to measure them, lumen maintenance, etc.) is
here; it's the thread I point people at who ask about how to do an LED conversion right.
Condensed version of the rest of the needed knowledge:
1. "LED bulbs" (no matter what brand/type/configuration) do not work anywhere near safely or effectively; they're illegal and really dumb.
2. The "LED retrofits" offered by a few different classic/hotrod type vendors are mostly unsafe and inadequate, too.
3. Without the tools, expertise, and equipment to make your own safe and effective LED lights, depending on the size/shape of your lamps you might fit ready-made truck/bus LED lamps inside the original lenses. They need to be upright, facing straight back at the back and front up front. My favorites are these, in clear-lens variety when available; their performance is excellent and they aren't expensive:
http://www.levineautoparts.com/vali6ovledla.html
http://www.levineautoparts.com/sttutareled4.html
http://www.levineautoparts.com/truckliestt.html
_________________
一期一会
Too many people who were born on third base actually believe they've hit a triple.
