Trying to use BBD with stepper motor on 76 258
I'm trying to upgrade from a one barrel to a 2 barrel carb on a 76. The first thing I did was find a 2 barrel intake on eBay. Not knowing any better, I ended up buying one for a mid 80s Jeep or AMC. I found a 2 barrel carb from a similar vintage engine that was in really nice shape and cheap. However, it has a stepper motor. I have been reading about the Nutter bypass, and I guess one of the steps is to get the stepper motor to move the jets to a rich position before you disconnect the computer. However, that's not an option for me. Other than just bolting on the carb and hoping the stepper motor was in a favorable position before it was removed from its original engine, is there a good way to adjust the position of the stepper motor? Or should I not waste time with this carb and try to find one from an earlier year without the stepper motor?
Also, before anyone asks, yes I know I need to get a new exhaust manifold to match the intake. I already have one. I also have the crappy stock Prestolite ignition but I'm going to upgrade that after I get the fuel system in order.
I apologize if this has been covered before but I couldn't find any answers by searching.