I am in the process of replacing the water pump on my 1977 300d. I have the fan and pulley off. The pump is held on by five bolts. Four are easily removed. The fifth (lower left facing the engine) seems to be blocked by the bracket for the AC compressor. A socket will not fit on the bolt. Is there a way to remove the bolt without removing the AC bracket? If not, have people ground away the bracket to get enough room for access without having problems with the bracket later??

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13