Not to step on toes Killer But Cforce is basically smoke & mirrors advertising with no porduct behind it , all C Force is is a diaphragm style clutch which is the Worst design to use with a high torque @low RPM engine like the 440 , the better style clutches are the Brog & Beck 3 finger or the B&B Long style , these use a coil spring for pressure which can be swapped like a valve spring to control pressure better than a stamped steel plate that the diaphragm uses
I use Mcleod clutches & you can talk to Red on th etech line if you need help with the rigth clutch choice for your/car engine combo