an rs turbo lump is by far the easiest conversion.

but you will need to find an engine, wiring loom, turbo, intercooler, all ancillarys, etc

to fit the actual engine you will need the mounts from a cvh engined mk5

then you will need to cut the 2 looms in half at the bulkhead and join the front half of the rs one to yours,

exhaust will prob have to be custom made to fit no doubt