Try turning the timing down it sounds like you might have the timing to far advanced that would make the car hard to start. How did you adjust the valve lash? Having the valves too tight could cause the condition you have also. Try the timing first though that will only about 5min. Let me know what you figure out.
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73 coupe, 351W, GT-40 heads, edlebrock 750, offenhauser intake, .488 lift cam, 2.5 exhaust, 2 chamber flowmasters, blah, blah, blah...
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