I have had to remove the R154 from my 1UZ 3 or 4 times over the last 3 years. The top 2 bell housing bolts are tricky to reach but other then that its not bad with jacks under the front 2 corners. Clutch change last spring took about 2 hours. W58 is smaller and lighter then my R154, should be a afternoon type project to go off and back on. I am still using the R154 pull type clutch setup and unbolting the pressure plate from the flywheel is probably the most annoying part of the job. A good Hydraulic throw out is definitely a good way to go. I will be switching to a Hydraulic setup myself when I switch to a Tilton triple plate clutch.