Towing: Is a 1Ton 5.7L gas Chevy ok to tow 10,000 lb 5er?

Years ago I had an '88 2500 with a 350 that I hauled a tall 9' TC with. Against a strong wind I couldn't maintain the minimum interstate speed of 45 mph! It was horribly underpowered. I traded it for an '89 F250 with a 460. It did okay with the TC, but then we got a 10K GVW 5er and were back to struggling. Traded it for a 2000 F250 psd and still truckin with it -- no more power problems. I don't think you'd be happy with the small block.