I can tell you what the original application was, but not if that particular engine was Lean Burn or not for sure. The abbreviations below might help. If you Google "lean burn thermoquad" you will get info on how you might use one in non LB application.
9140S 78 400 AT F (4041861) 4092 5137 1997 1-1/2 3
9147S 78 318 AT CA (4041865) 4092 5110 1996 1-3/8 3
Abbreviations:
- - - - - - -
AT = Automatic Transmission
MT = Manual Transmission ( No reference means both transmissions )
Pri. = Primary Jet
Sec. = Secondary Jet
Rod = Primary metering rod
Bore = Primary throttle plate diameter in inches, All secondaries are 2-1/4"
HP = High Performance
CA = California application; generic for CA, N95
F = Federal application ( No reference means both Federal and California.)
Can = Canada application. Typically, Canada used Federal carbs except noted.
LD = Light Duty
MD = Medium Duty
HD = Heavy Duty
LB = Lean Burn, ESA. Noted on 76's. After 76, most F cars were LB (N92, N94).
IE = Idle Enrichment
Alc = Altitude Compensator. Few noted, most CA and last years had Alc (N96).
HA = High Altitude
BV = Bowl Vent valve
O2 = Oxygen feedback solenoid
