If you really want to run a bigger fork and your worried about too much rake/slack?there is another option..
I personally think it would be ok just the way it is with the super T up front

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If after you put the super T on, you think it's too raked, you could find a set of aftermarket Rocker plates (Dangerboy or BETD) that will bump your travel up to 6 or 7 inches of rear travel.
By doing this you also raise the Bottom Bracket height, which intern gives you less slack to compensate for the fork....higher BB too..
I ran a Monster T on my Stinky for years with no problems EVER..People will say the aftermarket plates ruin your shock ratio, but my Fox RC lasted ALONG TIME,it's still going to be honest,and never needed a rebuild..
I actually preferred more slack so after I installed the rocker plates, I decided to run a 24"
rear wheel to increase my slack

thats why I think it would be fine just the way it is with stock plates, but it would be more of a drop bike/freeride and less of an all mountain ride..I'm not sure what your looking for ?? If your more into pedalling the bigger fork will make it more difficult going up(not impossible just more difficult

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I used the Dangerboy 7" plates but I think they went out of business??
here is another company that made plates that may still have them ?
http://www.mountainbikecomponents.co.uk/items.asp?CategoryID=99&Name=Kona+Travel+Plates