IF you are going to push ANY .45 ACP Semi-Auto Pistol to .45 Super Pressures and Velocity, I recommend using a Sprinco or DPM Recoil System with an 18 lb Recoil Spring.
I also recommend that you use Starline .45 Super Brass.
I have occasionally converted my older 1992 EAA Witness to .45 Super, using a Sprinco 10mm Witness Recoil Spring Buffer Guide Rod and a Wolff 18 lb Recoil Spring.
Ammunition was loaded into Starline .45 Super Brass. Bullets were Remington Surplus 185 grain JHP's.
Not sure about how you would go about converting a Cz97B to .45 Super, but I'm sure it can be done.