Alternator mounting with Moroso electric water pump kit

I believe the moroso kit said to mount it to the passenger side of the motor basically where the alternator is. That's what I did and used a gm alternator on the driver side. I just made some brackets out of the factory brackets. I have thrown a few belts due to alignment but have since solved that. They aren't very sturdy and can flex the brackets if I grab the alternator and pull. I'm using the pulley that came with the alternator and stock crank pulley. Car sees 6800-7000 without it being a problem.