You're going to need about 1 1/2" of room ahead of the damper so the balancer snout can clear the crankshaft. BTW, that's one of the worst-looking front motor mounts I've seen in a long time- - - -I'm wondering if it has sagged enough to let the balancer rub the crossmember?
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!