Hi Ramiro0727 - I couldn't say either way (I have my doubts). My brother still has my truck, he is finishing up a full SBC/TH350 rebuild. I am just collecting "parts" for little upgrades for it when it gets back into my hands!
But I am converting all the lights to LED. I got them from Speedway and most of them are United Pacific LED.
I just thought I post a photo of the United Pacific Flasher, so you could easily see it. In about two months I'll be able to feedback any issues I have or success