Dunno bout length but you may be able to use rears if you press in new bushings. I used the Bilstein 5100s from my 2012 Tacoma on my 4r, just swapped taco back to stock and got $6? Of bushings. Pressed with socket/carriage bolt/pitman puller method found here. They work exceptionally well and saved me $150 in doing my lift.
Just don't expect to find lots of info on it :/