Leaning out the beast

Hey all, I have a 1979 Ford Granada Base Model, inline-6 250cu, and its running REALLY REALLY rich...and has been since I bought it two years ago from th original owner. Its equipped with a one-barrell carb, and I was wondering if that carb is adjustable? I havent found any screws to adjust anything, I guess mabey they could be in the float chamber. Any help would be much appreciated.

William S.

1996 Ford F-150 HURST EDITION :evillol:
1991 Chevrolet Cavalier
1990 DODGE GRAND CARAVAN :loser: RIP
1990 GMC Suburban SLE
1989 GMC Suburban 1GKGR26N4KF509600
1979 Ford Granada