also, with regular bulbs up front and LED's in the rear signal, your blinker is gunna go spazzy faster. a trick i used back when i did alot of R/C drifting is that when my LED's are really directional, I would shave the top off of the LED to make it flat and spread out more.
hey if anyone is looking for led solutions, i have found the best site that has everything youll need http://www.superbrightleds.com/ and also my 2 cents, leds are safer, people tend to notice you faster, lest chance of being rear ended!
I made my own front LED turn signals from scratch check them out!! They are insainly bright..Brighter than any bulb you can buy I have them regulated at 12v for long life..These are about 1 1/2 years old and still going strong
oh I am also going to be opening up my third brake light and custom making an LED strip to go inside,here is what it looks like now