7 is not the correct check digit but 2 is
There are 0 records for 1FMCU14S2FUB63961.
1FM = multi-purpose vehicle manufactured in USA
C = 4001-5000 lbs gross vehicle weight
U = utility vehicle
14 = 4x4 Bronco II
S = 2.8L V6 engine
2 = VIN check digit
F = 1985 model year
U = Louisville Assembly
B63961 = consecutive unit number
Code are from here:
http://www.westcoastbroncos.com/Bron...in%20Tech.html