The gearbox on the Passat has died so I'm looking to upgrade the mechanicals.

It's a bog standard 1.8 20v (non turbo) with a 4 speed auto. I'd like to fit a 1.8 turbo with a 5 speed manual box but I'll settle for an auto if I can't find a manual.

Is it worth finding the parts and doing a transplant or should I just buy a B5 with the specs I want?

Cheers

Paul