1.8 and 2.0 blacktop are the same engines using all the same parts. Its slivertops 1.6 1.8 and 2.0 that use diffrent parts.
for some gearboxs to fit the blacktop you do have to swap the lower crank case/sump and flywheel for them to fit.

I dont know what car you have but if you have something thag takes the sliver top as std you'll need most of the parts from that model car.