A few things to note:
1. The blue dots steal a lot of light. I don't like them, and the color they make the lights. If you put regular lenses back in, your lights will be brighter and more 'red'.
2. Wiring the 1157 that way won't gain you much brightness, if any. You'll likely also need a diode in the wire that's connecting to the taillight portion when it's on brake, otherwise you will have the lights on brake all the time.
3. I don't know what voltage you're using, but the best LED lights are the total replacement ones, or the ones that have a complete board and lens, with a socket that plugs into your regular socket. These are all 12V though, I believe. This is one example:
https://www.chevsofthe40s.com/detail/4838/Chevrolet_Led_Tail_Light_Assembly_Left_Side_Stainless.html
