I'm afraid it's a little more involved than "going crazy with some shears"...
Every single vacuum line or air tube needs to be carefully followed to it's source, and capped.
The carb and distributor will often need adjusting after the removal of all these pieces as well.
More often than not when people start pulling that sh*t off, they run into problems.
It's not hurting anything being there, and with a 305, it has no performance to affect anyways.
If you're concerned about the appearance, just leave your hood closed at the cruise-in.
A 305 isn't worth showing off anyways...