fan dilema

[FIREBALL]

ok guys need some input i know the flex-fans are not a fav of some on here i myself have never had a problem with them but you never know. Anyhow i was wanting to change over to a clutch style but i notice a problem or maybe im just not thinking clearly. Right now i have a 350 a/c style with appearing to be a 3 or maybe 4row alumnium radiator (bought it with it installed) already. It has a short water pump on it and the v-style pulley setup. Now as it its now its got a 2" flex a lite fan spacer on it and a flex fan that goes somewhat inside the shroud maybe a inch or little more. My question is being as it has that spacer and all if i go with a aftermarket fan blade can i run a clutch on it or would it be too much strain on the pump? If igo back to total stock it wount be close enough.....from what im seeing i dont know though Im in a deliema because should i run a steel hub with stainless blades or a total steel design. I just dont want to put too much on the pump and would it work is another question anyhow see the links below and i apprecaite everyones input cause it will help me decide for sure see the link below...
http://www.summitracing.com/parts/FLX-5534/
http://www.summitracing.com/parts/FLX-1817/
http://www.summitracing.com/parts/FLX-1617P/
http://www.summitracing.com/parts/FLX-1717P/