Review on Top10 Racing Compatible Compressor Positioning by Matt Larsen

The most important thing about 5.4 timing is the position of the crank. Can't recommend buying. The tool does not fit on the crankshaft. Bad quality control. After you weld them on, put them back on the crankshaft to see if they fit before shipping them. The one I got doesn't even come close to slipping over the keyway. In any direction. The side that goes over the crank and keyway has a weld in the keyway. So make the tool unusable