The ones in image #1 use the reflector much better than the one in image #2. If one in image #3 will fit, then it may be better.
Keep in mind that the junky LED replacement bulbs are way too dim. So the brighter the better, and it needs to emit light at all angles, not just forward. Also, for the tail lamps, you want red LEDs. And for the amber lamps, you want amber LEDs. Do not get white ones in either case and put them behind a colored lens. White LEDs aren't as bright behind colored lenses as the actual correct colored LEDs are.
From personal experience, I have red ones similar to image #1 in both my Charger and my '69 truck. They work well and have a decent light spread from the reflector. A friend of mine tried ones similar to image #2 and they were terrible -- just a small circle of light in the middle of the tail light lens.
Also be careful. That first auction you posted has a Buy It Now price if $51! You should be able to find a better price than that. I also suggest sellers from the USA.
Here is a good guide to answer some questions:
http://www.v-leds.co...e/ledGuide.html
I've bought stuff from v-leds before when they had an eBay store. But they closed the eBay store earlier this year for some reason. And now their prices are high on their own eCommerce site.
Edited by charger383, December 29, 2011 at 08:51 pm.