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I am finally in posession of the smaller main jets I needed for my Dual Dellortos. In the morning I will install them and hope for at least a minimally exceptable state of tune. The current set up is with the issue 128 mains and anything over half throttle just boggs down. I have in my posession the follwing other sizes:115, 120, 125. Does any one out there have a reasonable guess as to which to try first? The dellorto tech sheets say Venturi size times 4. In this case that is 27x4.2=113.4 yet every carb shop says 128's on a stock 1600dp. What's more is that the engine is mildly hopped up with merged exhaust, relieved exhaust ports, engle 110 cam and the 009 w/pertronix. The FRD carbs only have an external idle circuit fuel mixture screw for adjustment. Any one with these carbs have any suggestions if the car still runs excessively rich? Also, I live at a 2,300 elevation. Brian Fye 64 Notch auto-went around the block 67 Square- within an inch of daily driverness 67 Square- a rolling trapazoid of extra parts