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
Looking at his second pic again, that's the radiator support, not the crossmember. Looks like the bottom of the balancer pulley is above the top of the crossmember to me. Looks like Wally has the single mount for the radiator support as opposed to the two straddling the centerline.