Car hauler ( upper rh side ) in the picture with what looks to be a 81-83 Pontiac Grand Prix on the rack over its cab.
About '77 COE trucks. Volvo fonally solved bone shaker problem of COE trucks and new generation of COE F-Series (F10 and F12 were introduced in 1977) had installed on four coil springs cabins. Later they used air bags. Volvo F-series were discontinued in 90-s, becouse they used Euro-II engines and in 1993 new D12 engine was introduced in FH trucks.
no it is ng and this is first generation before 1976 also you can see om403 v10 engine.sk are introduced in 1988