What chassis for tikka T3.

So far I have a shilen heavy sporter 17rem barrel on my T3 all stainless in a wood factory stock. I want to drop it into a chassis and make it a switch barrel with a 223 barrel. If I go with a chassis, does my action need to be modified to work with the DBM that the chassis's use? Or will it straight drop in?
 
T3 TAC 20" barrel in a KRG W3 V3 folder. Looks kind of silly without a suppressor on it IMHO, wish the govt would get with the program and send me my tax stamp already.

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