One such area is also the main fixture of the engine--the crankshaft. Of course, factory crankshafts are not machined to performance standards, and are often not even close to these specs.

duralumin crank journal expands .0057 inches (0.14 mm). In contrast, a same-size steel journal would grow .0028 inches (0.071 mm)—enough to get the whole fixture knocking badly and eventually ...

Its Bellhousing Alignment Tool consists of a fixture that bolts to the crankshaft's flywheel flange and a separate locating ring that slips over it to easily and accurately align the bellhousing.