The right side of my truck is about 1.5" higher than the left side after flipping the springs. Would it be wise to install a 1.5" lowering block on one side to even it out?

The suspect the passenger side is lower just because of obvious Ranger reasons of the fuel tank being on the opposite side. I don't think it's a mechanical error because I replaced both leaf springs with new ones when I did the flip kit. It's been installed for about a year, so it's had plenty of time to settle.