[saltshaker]

The linkage position on the 1850's is different then the Blk/by carbs. You can google it on the "fordfe" forumn. When I set mine up it was suggested to disconnect the linkage and get the front carb tuned and then reconnect it and adjust the rear carb. It also helps to connect the vacumn caps together ( need a special cap) so both of the carbs rear barrels open at the same time. This was how Ford had set it up.
I have a couple of those threads from the forumn ....send me a pm with you email and I will froward them.
Jon