Probably not too bad. That's basically a 3/4 ton rig, 8600 gvw if I looked up the right one. Truck + trailer is probably ~8k, maybe 9. I'd guess ~1500 lb on the ball, probably 7500-8k gvw on the sub. Maybe a touch light on the front end but not unsafe. Perspective in the pic makes it looks worse than it is IMHO - still got quite a bit of space in the rear wheel wells.