Distributor hits Intake Manifold

Hey folks,
Having a bit of trouble getting my timing set.

My HEI distributor (pretty sure it's this one- didn't get any packaging with it)



hits its vacuum chamber on my intake manifold when I try to advance it. I'm still about 10' shy of ideal. (see attached image)

I've tried rotating it 180', but then I run into the same issue with the firewall, and it gets all mangled up in the kickdown linkage.

Rather not buy a new distributor or intake... any brilliant ideas?