I understand that everyone has their opinions and different experiences w/this and many other subjects so I may just get 10 gallons and play w/it and see how the WB and plugs react and go from there. I SHOULD get a new 02 sensor and free air calibrated it after the swap and some runs just in case mine`s not totally accurate cos it is at least 7 years old and has seen Rockett Brand leaded racing fuel also back in the day.........I appreciate all responses..............