Found this:
http://performanceaccessories.com/instructions/5623.pdf
Very good install instruction for the 2006 Tundra 3" body lift kit from Performance Accessories. Holy crap is this the most complex body lift install I've ever seen. Part #5623. 2005 should be ok to use this kit, not much different.
Good news:
Front and Rear bumpers get moved up.
Steering shaft extension looks ok.
Shifter linkage looks very well thought out.
Bad news:
Factory trailer hitch does not get moved up (space between that and rear bumper).
If you have any sort of front winch mount that goes under the front end (I have the Warn Trans4mer), you've got to do some welding to make a new mounting backet and bring the mount up.
But all in all- with the front end up 2-3" with spacers or adjustable coilovers and a rear 1" block- I'm thinking 35s might actually (narrowly) fit.