I have excellent results with the post 1975 LMAB models all the time.
Even so, there is no "specific" answer to your question, we don't deal with "rule of thumb" or calculations based on jet/rod metering area when setting up carburetors. Although all that stuff looks good on paper, it's next to useless in practical application as airbleeds have as much as or more effect on fuel delivery across the load/speed range and changing out jets and metering rods.
In any and all cases, these carburetors need to be set up or calibrated EXACTLY for the application. This is done based on carburetor number, how that carb is set up from the factory, and all of the engine/drivetrain/vehicle specs. Correct fuel delivery starts with the idle system, as it feeds the main system thru transition, so each calibration we suggest or use is actually application specific.
There is no direct correlation between a post 1975 carb for any manufacturer and an pre-1975 carburetor. There just too many applications, different types of carburetors and different calibrations. Chevy carburetors from 1970 thru 1976 divorced or hot air choke will be large MAB. After 1976 the divorced choke truck carbs were SMAB, and they introduced SMAB into the hot/air electric units in 1979, but some models were still large MAB to 1980.
Automotive carbs post 1980 will be computer controlled, as were CA emission truck carbs post 1981. 48 State truck carbs were non CCC till 1987 when they switch to TB's......Cliff
