Not Ranked
Micheal, I have my doubts that you will acheive that sort of throttle response with the setup as it is.
With your staged throttle linkage setup it tends to favour the #2/6 cyls as the front carb opens then around 1/3rd throttle the primaries of the rear carb above #4/8 cyls open and that rear accelerator pump toss's some extra fuel in at the rear of the manifold- meantime the front carb accelerator pump is just about all done. One end of the manifold has a carb that is now running on the main venturi's while the other is just getting off the idle circuit. Same thing will happen with the vac secondarys since the airflow thru the primaries triggers these- even though you have a balance pipe between the two vac cans the different airflow rates of the carbs will send the cans a false signal that doesnt relate to the actual airflow of each carb.
As Stan J has pointed out the 1850's are not really suited to this application and your 6000rpm limit is unlikely to utilise the 1200cfm you have available.
If it was mine I would ditch the progressive linkage for a 1 to 1 setup and use a cable throttle and a 'snail' cable drum on the carb so that the throttle opening was slow initially to give more 'feel' in the pedal etc for street use.
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Jac Mac
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