engine swap help, minor issues

[clay69camaro]

Couple of Q's:
406ci small block built for a 72 Nova, now being installed into a second gen camaro 70 or 71. The car and engine belong to a friend of mine. Right now were having header clearance issues.

The long tube headers we have were already on the car with the 302ci but now they do not fit (collector hits the floorboards), and his hooker super comps for the Nova don't fit at all, which I don't think they will.
Any suggestions on a fix or different headers?

No vaccume ports on the intake manifold so now the brake booster has no hook up? What to do about this?

No vaccume ports on the carb, what do we do about the vaccume line from the TH350?

Any help is appreciated. Thank you