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removing a power valve usually requires going up 8 jets sizes if you are running stock pvcr's. I don't think 80 to 84 is enough.
Agreed to a point but it is also based on pvcr`s sizeing...........bigger pvcr`s means you can go lower on the primary jet for a clean cruise and get the wot where it needs to be. Get a wide band and stop guessing would be my first suggestion and become a better tuner............. 
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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