It does matter where you put the spark plug wires if you have the balancer at set at zero or TDC on compression stroke. Take the spark plug out of #1 cylinder and put a cork from a wine bottle in there (my favorite way). Crank the engine over until the cork shoots out and richochets all around the garage Then ease it over until you have balancer at zero. Then drop the distributor in so that the rotor is pointing right at the #1 terminal - which should be close to firewall towards driver. Spin it counter clock-wise a little bit and lock it down. Put your plug wires on starting with #1 in the correct order going counter clock-wise. Pour some gas down into carb primaries. Car should fire right up - never fails for me. For a 69 at least, you need to remove the black-pink wire coming from firewall with a non-resistance wire and hook it to Batt on HEI. Where are you getting power for the HEI?