Installing an American Powertrain Hydramax system in your hot rod or muscle car is an excellent upgrade. If you are swapping to a modern manual transmission, and why wouldn’t you, then installing a modern hydraulic clutch is also an upgrade you’ll enjoy thoroughly. Doing so is easy thanks to American Powertrain’s kits, which are available as a direct bolt in for a variety of applications and also available as a universal system that can be installed in virtually everything. One of the key aspects of doing an installation with one of these systems is making some particular measurements so that you can set all the dimensions that need to be in place for proper operation.
One of those is measuring the air gap between the hydraulic release, or throwout, bearing and in this video from RedDirtRodz you’ll see Jefferson go over just how to do it on your own project. He’s doing this outside the car, and if you are doing a complete engine and transmission installation we’d do the same thing, but if you are swapping a transmission into a car with an engine still in it, this can be done in the car as well.