Don't hook you new power wire to the old original wire. The original has a resistor in line so the points wear better. You have to get on the other side of the resistor. You may want to get to the key switch and hook the Start and ING terminals together and run a new wire out to the distributor. You should also use 14 gauge wire. The HEI needs all the power you can give it.
Like the above post said, you will have to redue the fuel line. The HEI will set taller. Your vacumn line will also need to be rebent.
