[Jeff Lee]

325 383 CDP 10.00 1-4 Cart AFB-4130S, 4132S/SM 301,666,968 1.5 H 73.5 D,2
Carb sizes – # 4130,4131 – 1437x1563/1186x1313
Carb sizes – # 4132,4133 – 1437x1563/1063x1563
350 440 C 10.10 1-4 Cart AFB-4137S, 4131S/AUTO ONLY 1.5 H 73.5 D
Carb sizes – # 4131 – 1437x1563/1186x1313
Carb sizes – # 4137 – 1437x1563/1063x1563
350 440 D 10.00 1-4 Cart AFB-4130S/SM, 4131S/AUTO 1.5 H 73.5 D,8
Carb sizes – # 4130,4131 – 1437x1563/1186x1313
Carb sizes – # 4136,4137 – 1437x1563/1063x1563
365 440 C 10.10 1-4 Cart AFB-4137S, 4131S/AUTO ONLY 1.5 H 73.5 D
Carb sizes – # 4131 – 1437x1563/1186x1313
Carb sizes – # 4137 – 1437x1563/1063x1563
365 440 P 10.10 1-4 Cart AFB-4130S/SM, 4131S/AUTO 1.5 H 73.5 D,11

Are you sure you have the right carb for a '66 Plymouth 383 / 325 engine?
FYI - AFB 4130s is for an automatic transmission and 4132s/SM is for a "stick manual" transmission. Be careful, often times the "SM" carbs are smaller CFM for better in-town driving; especially on a larger car like yours. Don't you have an automatic trans?
If the AFB you borrowed was for a 1966 440 (maybe it wasn't), then it shares the same specs as your 383 AFB.