Anton its good to check the easy things first,I wish it had been timing then it wont get costly!Im not entirely convinced its springs but it maybe?I just beleive Lunati has been building for a long time and they know better than most of us what their cams require.Also most head shops set springs tight just for this reason?Make sure you check carbs,fuel flow and any restrictions in fuel lines.I have seen aftermarket fuel filters cause restrictions in fuel flow.It may even be a vac.leak somewhere(but if I remember right you said you had ample vac)? Check this stuff and if that is not it have springs checked.Try running car with or without aircleaner it may even be starving for air? Just some ideas. Steve
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