Hello Tedly. Costain mining used to have a Tc6 Euclid Dozer with side by side C/6s on an opencast near where I live when I was at school. The radiators were behind the driver and It suffered from O/heating I remember. Sites are quieter now what with H and S. Body exhausts and funnel size silencers.There Is a quarry In Cumbria that keeps antique plant running, I will give you a report when I go. I last drove a GM engined dump truck about 8 years ago I think it was a V8 supercharged and turbocharged but it was well past its best. I drove a Yale 2500 loading shovel years ago It made its own music Trumps are allowed. Vickers built Two prototypes with C8SFL engines I remember sitting on them. I have a C4SFL with 10 registered hours. C8s have a soft unhurried exhaust note. keep porting eludes me to sorry.Regards John. (Remembered 2 strokes ports no valves, keep on running)