Anyone got info on this kinda thing?

Im currently toying idea of fitting it to my 90spec 3i using combo of sierra pump to fit my cvh, and an aftermarket kit to control it.

Maybe fit a Mk5 heater/aircon unit in dash instead of mk4 stuff, as i see the blower unit still fits under the scuttle on mk5 like on the mk4's so in theory the unit shouldnt be TOO different.