Im old school sorry.
If you want to spend money then fine, but please dont put a v6 in it.
Added lightness is the way, not added heaviness .
You must be new here.
The V6 has an alloy block. Not especially heavier than the iron J4RS engine, Besides the V6 is well balanced so it doesn't really matter.
The 406 V6 engine in the 306 is a good combo. Passenger up in, or drive one if you ever get the chance.
________________________________________
2005 Peugeot 206 GTI 1802008 BMW K1200R