whats all this about Small turbo plenums being different bolt patterns?! just drill out the holes in the throttle body to 8mm job jobbed. i believe 4x4 tbs may need a touch grinding off somewhere as the iscv fouls the manifold slightly but i can confirm the 2wd throttle body fits and works perfectly, flows plenty of air for 500+ bhp.
you will gain throttle response with a larger throttle body but as said it will be harder to map as you lose low end resolution.