Old man emu heavy load leaf springs

Good afternoon. new owner new member here. Love my truck but sagging in the back. I got old man emu two and three quarter inch heavy load leaf springs they arrived all beat up in a fed ex truck The plastic things are worn off the sides and I'm having some questions. is there a left and right? they seem to be slightly different markings on top in the bright yellow color the emu uses for its logo. thanks in advance
appreciate it

 

Both sides are the same. You might have a pack that's slightly underspec with a "-" or slightly overspec with a "+" or no mark is perfectly within specs.

 

Do you continually carry a heavy load?

 

I know I'm going to be towing a lot the next month trailers up and down California. I have a big shell and a toolbox and usually a bunch of stuff in the back.

 

^this