[storm9c1]

With the peak power down low, that would make a good engine in front of an overdrive. You could undergear that thing and cruise at 1500 RPM at 65MPH I bet with how light it would be.

How to do that, I'm not sure. I think the 366 has a standard bolt pattern, so any Chevy transmission should bolt up. Or add an OD unit instead of the splitter. I'd be tempted to try it. I would definitely try to take advantage of the torque and lightness of your chassis. Ditch the governor if it has one. Don't get too attached to the axles, they may hold you back. If you want a light-duty dually with the HD appearance, find someone with a Dana 70U and highway gears (ie: 3.07 or less if you can find it!). Folks usually want to give those away. And forget trying to rev it and lay tire. It won't be a good setup for that. But you can use the torque wisely and still have fun.