facelift clocks in prefacelift

I know this has been talked about a lot and the end result is 'massive job, different looms'.

My question is, the facelift turbo clocks have a boost guage that is pretty cak and I pressume the look change for that would be difficult. However, if I were to put facelift clocks in a pre facelift that but sourced the clocks from a non-turbo would that be an easier change? I am guessing the volt meter is just a positive feed going in so the wire might be less complex? Then I can use my own better boost guage.

Or is this still a 'massive job, different looms' answer.

remove the dash loom and fit a facelift one, not too hard a job done in a weekend.

i wouldnt bother though, they are only a little nicer

I fitted a vdo clock from a porsche, much nicer than any Supra clock and easy enough to wire up.