Can you lock up your disc brakes?

I have just the KH 4-piston stuff up front and 10" drums out back. Tires are 235/60-14s and 295/50-15s , all BFG Radial T/As,or Cooper Cobras, and with no proportioning at all. I also use the 15/16s M/C, cuz it has excellent feed-back.
and yes it will lock up the fronts, to 30 mph at least, which is where my testing stopped.
This 68 Barracuda is the best stopping car I have ever owned; IMO, for a streeter, it stops fantastically, lol.