Would this be a good motor for classic stunt?

I think that motor was put into production about the same time the Fox 35 was.

You guys crack me up...
 

You're gonna need a battery of the same vintage, I'd strongly recommend something with a lead-acid chemistry, a 2S1P Volkswagen pack will give you around 12 volts... and plenty of capacity.  You'll have to build super light to make up for the weight penalty of the ~70 lb. pack (CG adjustments should be easy).

Using your motor and the above recommended battery should yield max authenticity points but, once in the air, don't go inverted.  The spilled electrolyte will wreak havoc on your finish, the judges, your helper, onlookers.