Roger Brown body lift

Hey guys, I just got a 3" suspension lift installed on my '09 taco lb dc sport with some 33" bfg ko2s. I had to remove the front tire mud flaps to reduce the rub. But I still get rubbing while driving and hitting a dip or full lock in reverse.
I had a RB 2" body lift on my old 88 hilux and it worked out well. But what I'm concerned about it how strong the lift brackets are for the front and rear bumpers. Can anyone testify of their strength? Like if I can still tow a couple dirt bikes on a trailer from the rear bumper?

Cheers!

 

In case anyone comes up with thisse question, Roger has it outlined under "rear bumper relocation" sub heading.
http://www.4crawler.com/4x4/ForSale/Docs/BodyLift_HowTo.shtml#AutomaticTranny2

I would suggest reading through the entire write up throughly as it answers a lot of questions and helps prepare you for the install and possible issues.
Cheers!