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Who has a 750 DP laying around?
Throwing street use out the window?
A DP is the last carb you need on the street. It'll suck fuel like no tomorrow. Every time the pedal moves they shoot fuel on both sides.
Wrong... The linkage is still progressive. Stay out of the secondaries and you'll be fine. I daily drove my dart for years with the 340 and a 4150 750. The car ran 12.30@107 and would get 15MPG @3600# with 3.91 gears and 26" tire. BUT, I dont think the carb is the issue, its probably multitude of things making this a mismatched/ underperforming combo.
The OP needs to weigh that thing before we get into too much detail. Yes MPH seems low, but that car could be pretty heavy which would explain most of that.
-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
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