For it to make muych difference alone due to a rebore, it would have to be seriously shagged to start with, but then all you would get is what was there to start with a healthy engine, unless you can go a really good amount, I don't know with the mondy lumps, but on 2L pintos bored to 2.1L there was a noticeable torque increase, a easy cheap upgrade is flywheel lightening, but the usual air filter exhaust etc add a bit, cams etc also help but then you start to have problems with CR/det and a unsuitable ecu.
tabetha