Have you checked for vacuum leaks?

Did you get all the various outlets on the carb plugged? Is the base gasket sealing?

These were all problems I had with my Holley swap.

Are you getting air and fuel through the idle circuit?

What sort of vacuum are you getting at hot idle?

__________________
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