stick with small twins mate, you won't go wrong
the engine doens't rev up enoug to make sue of a super huge turbo, the twins can be small enough to be kept on proper boost from low to high, T25's or, at a push, T28's or thelike would be more than enough
i think i had T2's to make 12-13 psi max and they worked right from idle all the way till about 5500 rpm when the power sort of dropped off a bit