changing the bolts was a breeze. but i suggest not to tighten the nuts ont the stud connecting to the ventilator pipe to tight cause it will break off. I use a torque wrench and set it for 17 pounds and it broke around 10 pounds. I ended up using the screws from the valve cover, which fit perfectly.
what torque did the Toyota service manual recommend? 17 ft-lbs?
how do your old lift bolts look life?