Left and right Torsion bar

^^^ Right... with the larger T-bars, the adjusters will end up with different settings than with the smaller bars. So, yes, re-adjust; your new bars have a 50% higher spring rate than the old /6 bars.

(The adjusters would only end up in the same place if the T-bar clocking ended up in just a certain way, which would happen only if it they are made oddly.)