-brakes(G60's front, MK4 rear, G60 MC, stainless lines, DOT5.1 fluid, air cooling from front splitter)
-tyres(modern radials, possibly semi-slicks)
-engine(not just more power also cooling, oil baffles, upgraded main bearings etc)
-interior(leather, recaro's...and who knows what else)
-exterior('87 look with 84 side stripes, audi ibis white to make more modern)
-handling(stress bars, modern gas shocks, G60 top bearings, tyres, all new bushings)
-Rims(to compensate for the heavy G60 brakes and therefor to limit unsprong-weight modern light weight rims)
and so much more...