I've discussed this too with my brother-in-law who is a knowledgabel guy. To put it short, he said that a 5 year or older turbo-kit versus a new top of the line kit of today has no chanse since all parts at all time will be made better. And to considder a 10-15 year old "stone age" kit for your car versus up to date advanced stuff like you see in the pics above makes no sence.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.