I forgot the next step.

If the idle circuit is OK then the only other cause for the drips that I know is that the carbs are way out of sync. And the dripper is pulling way more vacuum, exceeding the fuel feed capacity of the idle circuit. The answer is to adjust that carbs idle so less air is going through and balance it by giving the other carb a little more.

But this should be apparent when you do the ear test.

This is all plausible, because you have radically changed the compression and hence the vacuum in the engine.

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe