My stock Achilles 2233s cracked less than 2 years. It's not a bad car really the Suprima. It's just that the public perception than all Protons are bad.. The QC is below par, but the ride and handling easily beats 'old' BMWs (not on stock Achilles tyres though)

. Test drive first, then give your comment.
Back to the gearbox swap topic, I think it can be done. However, do you really want to spend money and time on this? The CFE is not exactly a smooth or powerful engine anyway.
Maybe MIVEC engines fit better in the engine bay?