I’m going with jimbo1111, it definitely sounds like your lower balance shaft is 180 degrees out of sync, easily done and a common mistake and even pro shops will swear they have it set correctly.

 

My 4 wheel alignment cost me 95.00$ Canadian......that's about 5 dollars US LOL......................... with a shop that knows what they are doing. Ouch

 

I couldn't agree more. The above shop was very thorough and did a great job but it was clear they were overcharging and "taking their time". Moved on to Frank at Zeigler Exotic Cars in Phoenixville outside of Philly for complicated jobs I can't tackle. Frank is a standup guy and does hard honest work. Mostly services Italian and German exotics. Couldn't recommend more to anyone in the NorthEast.

Frank checked the balance shafts before and agreed to do so again at no charge. Going in for inspection and checkup in two weeks. I'll keep everyone posted on the report.

In the meantime I may order new fuel injectors as the current set is showing it's age.