it will understeer more but that can be countered by stiffening up the back end. and uprated rollbar on the stiffest setting and some shocks also on their stiffest settings will be plenty if not too much. also some really good front tyres will go down a treat. toyos are great cant fault them at all.
i would imagine that you will be ok, it will never be "as" good as a std engine k11 but it wont be far off IMO.