March serp belt pulleys with factory brackets

.LONG story short, my issue was not all in the pulley alignment...I solved the issue by using a thicker/stiffer and wider belt than normal. I forget the exact size, but I went up from like 0.8cm to 1.1 or 1.2cm width. Problem solved.

Huh. I used a Gates 7460. Not sure how wide its supposed to be since it's kinds destroyed.
Didn't realize there were wider V belts available.

I also thought about going to a shorter belt?