I like how you dropped the front blinks. It looks good.

 

You can get load resistors and put them in parallel with each LED unit to slow them down. You would have to get resistors that are in the 6 to 10ohm range (about the same load as a light bulb filament) and they will have todissapate quite abit of power (use a 40 to 50W rating for headroom)... The only problem withresistors is that they negate all of thepower saving you gain from the LED units because you're are basically drawing the same current asthe stock bulbs would.

An LEDflasher is way more efficient, but costs more. You also have to make sure the flasher is compatible with your stock wiring. Price is not that much different frombuyingtwo load resistors though. Two resistors are about $8.00 wheras the flasher will run you about $12.00