hard engine starting

10.6V IS JUST FINE

TEN POINT SIX VOLTS IS JUST FINE!!

Back to basics..........Start with checking "cranking" spark. Check spark while cranking USING THE KEY This is important because it sets up the exact conditions during "trying to start."

Get yourself a spark gap checker or make one. "Rig" it up at the coil using a SOLID core plug wire NOT the resistor wire. What you want to do is check the coil output without ANY of the "in use" components on the engine, IE coil wire, cap, plug wires........you want them all out of this test.

With MSD obviously it should have an IMPRESSIVE spark

Try it a few times to make sure the ignition switch does not have an intermittent.

Next test you want to begin BEFORE you have run the car, start cold in the morning WITHOUT cranking. Open the hood, look down the carb, and work the throttle looking for accellerator pump spray. If not the carb is boiling dry during parking.

Also, before cranking, pull the plugs and examine them for fuel fouling. What you are "wondering" is "if" the carb is boiliing over during park, and running fuel down into the cylinders with open intake valves.