I would definately go with the serpentine belt setup. It's a lot cleaner look in my opinion. If I could find a low cost setup for my 440 I'd be all over it. And I'm a big believer in electric fuel pumps. Way more efficient than mechanical. It's so nice to just turn the key and know you'll have a supply of gas right there instead of having to crank the engine over a couple times to fill the carb. Just my opinion.