CAST IRON; 2.280 IN. DIA FILLER NECK HOLE; 0.486 IN. DIA GAGE ROD HOLE; 0.500-14 NPT INTERNAL THD HOLES ON ONE SIDE OF HOUSING; RECTANGULAR MTG FLANGE 4.500 IN. W; 7.125 IN. LG W/FOUR 0.410 IN. DIA MTG HOLES SPACED 3.750 IN. C TO C ALONG WIDTH AND 6.188 IN. C TO C ALONG LG