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2nd unit doesn't have a handle and looks like it has some different connectors
1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989
5" across for the crankshaft stud holes
These are the Later Style "Alpha One Gen I" Pins that would have not normally been found on early models
MerCruiser 44354A3 807914A1 4" Exhaust Manifold Elbow Riser V8 5.7L 5.0L 350 305 7.5hp 2nd unit doesn't have aPart Number(s) Included MerCruiser Exhaust Manifold Riser (You get the PAIR as pictured) Superseded Equivalent Possibly Related P N: 44354A3 807914A1 807988A2 807988A03 General Application Compatibility For the most part, MerCruiser SBC GM 5. 7L 350 & 5. 0L 305 V8 applications (as well as V6 4. 3L applications but the brass elbow on the front is different straight vs. angled) 1987 1997 using "Wet Joint" Exhaust risers 4. 3L V6 262 185hp 205hp