they'll fit. stock size tire is already a 33. all you're doing is going wider. Discount doesn't like installing wide tires on narrow OEM wheels.
Just got myself a set for my Pro 4X (LT-275/70R18) last week and happy with them. They drive nicely and pretty well mannered even if I push them around corners. I'd say that they are close if not a hair better than the BFG T/A KO I had on my old Tacoma.I'm assuming that tire carries an E load rating. Run the pressure up around 42psi or so, and check your contact patch. If it looks good, leave it. Adjust as necessary.
I'm running LT275/70R18 E load rated BFGs and I run 48 in the front and 42-44 in the rears. Wear is consistent and even.