is there any adjustment on the diversion valve? it seems like its allowing to much vacuum. if that be the case, and its adjustable, try taking away some vacuum at idle.
if not, then maybe try turning in the modulator a couple turns. the shifts will be more aggressive than they were already @ WOT, but theyll firm up the lighter throttle shifts.
how much vacuum is the modulator getting where the hose goes into the modulator? the thought of having the wrong modulator could be a possibility.
also some spring changes on the governor with the modulator adjustment or change could be all that you need.
if anything, try running off the full vacuum port on the carb and see how it does. at least youll know.
if not, then maybe try turning in the modulator a couple turns. the shifts will be more aggressive than they were already @ WOT, but theyll firm up the lighter throttle shifts.
how much vacuum is the modulator getting where the hose goes into the modulator? the thought of having the wrong modulator could be a possibility.
also some spring changes on the governor with the modulator adjustment or change could be all that you need.
if anything, try running off the full vacuum port on the carb and see how it does. at least youll know.