1984 Freightliner FLT086 Engine: 10L L6; with 34in Long Belt; Position: Alternator;. 1985 Freightliner FLT086 Engine: 10L L6; with 34in Long Belt; Position: Alternator;. 1986 Freightliner FLT086 Engine: 10L L6; with 34in Long Belt; Position: Alternator;.