I see two glaring errors- - - -there's not enough threaded stud sticking out of the hub to attach the wheel securely, and there's a big gap between the center hole of the drum and the shoulder of the hub. There's no way that drum is going to run concentric with the hub with nothing but sloppy lug bolt holes trying to center it. Check the back side of the hub flange and see if there's a shoulder that will center up the drum correctly, and then buy some longer wheel studs to attach the drum to the back side of the new hub.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!