Just looking at them they look like a mess, short runners are bad for TQ but the abrupt turn coming out of the head is bad for peak HP. They is no way getting around the compromise needed to get a carb or throttle body to fit under a low rise hood with ports coming vertically out of the head. If you just want to get it in and running it should be ok but the dyno tests I have seen show all those type manifolds (XV mopar performance low rise...) down on power compared to everything else. This is why the tall intakes are so good, you get a very straight shot from the carb to the valve. The EFI barrell intakes are better because they have such long gently sweeping curves. If your main goal is getting a carb under a low rise hood you just have to make those puny ones work.
I am not causing global warming, I am just trying to hold off a impending Ice Age!