That sounds like a great idea! Your Golf should always beat him on handling regardless of what mods you choose.
You're having a laugh aren't you?
Prejudice's aside, the Mondeo has one of the best fwd chassis of any modern family car - it is truly class leading.
This cannot be said for the Mk4 Golf, regardless how much fondness we hold for them, you need to be realistic.
Mondoes have
always been praised for their handling, and, in general (R32 aside) the handling of the Mk4 Golf has been slated.
Unless the golf undergoes serious chassis upgrades the Mondeo will be the better handling car of the pair.
I'm not a fan of Modeo's (I once had one as a company car - yes, I was Mondeo man) but you can't knock the car Ford have produced...