Dwayne,
They look like they should work fine on the Fox. One way to balance is with one part auto clear. It is heaver then dope (one coat equals 4 coats of dope). Another trick some guys did on the Fox was to set the heavy blade up with the piston at bottom dead center, this works to add to the counter weight and reduce vibration. Trick with this is to fine the right amount of off balance.
Best, DennisT