blowwer
i have run what you are doing for years and i loved it, i ran a short moroso aluminum water pump with the water pump pully from a 289 ford it is same diameter, bolts right up to a chev, and it has a smaller neck to avoid the belt, with this setup you can run the short blower snout which is better then a long neck. if you use the long water pump you will have belt issuse unless you get a longer blower neck. I ran a fiberglass fan that costs about 15 dollars from jegs with a shroud and i was making 16 lbs of boost on c16 and i had no issuses.