Start by plugging the vac port on the front manifold behind the isolator. Next hook the crank case vent to the PCV (balance tube center). put the air cleaner back on the car, these carbs need a filter to increase the manifold vac to run if they aren't properly tuned. Cap EVERYTHING that isn't being used on the manifold, and hook up the hot water circuit to the manifold, if you let everything get up to temp it will run better..
My 73 wouldn't run off idle when I did the conversion at first untill I put the air filters on and dialed the carbs in from there. Once I got them really close I was able to take the filters back off and fine tune the carbs.
Edit; check the bamper oil as well.
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