Carb Spacers...

If you ever have your header off Wrap them! that will help as well.
Another trick, until you get the headers Wrapped. Get a 3/8 rubber hose. split it down the middle and slide it over the fuel line, on the fire wall, to keep the headers from boiling the fuel right there.

alu foil over that, will help a lot

EDIT the frame rail next to the header not the fire wall.