There is no room to raise the actuation arm as it will foul on the wheel rim (see photo). As it is I had to go to 16" rims to clear the calliper.
The test requires the car to resist movement when some throttle is applied. That may be a little hard to exactly define but in my case it moves freely with no throttle.
I have searched GT40, Pantera and Viper sites and nobody has a decent word to say about this Wilwood calliper even though it's promoted by many performance speedshops. The common finding is it will hold a car once it's stationary but that's about it. I agree with the test standard, I really want something that will protect the investment I've put into this car.
There is another similar unit but all I can find are threads on how to install it, nothing on how it performs.