Friends, I have a spare BBD carb, model 8384, via craigslist. It has already paid for itself by supplying a stepper motor to replace the broken one out of my 84 J10 258. Problem is that I have no idea if the carb in the truck is the specified 8340 as the tag and stamp are missing. Anyone know if the venturi clusters and the intake tube assembly are interchangeable between the two models? If they are, I would get the spare one drilled out to 0.032. After the carb rebuild, I forgot to ask the rebuilder to bore the tubes out. After the rebuild, the truck ran well but is beginning to idle roughly.
Thanks, Marc