Are you referring to the Mark Williams kit? I believe it comes with stub axles too, for the "over $4,000" price tag. There are other potential differences that can drastically affect the price. Examples are 300M vs 4340 (or 4130) shafts, strengthened vs standard CV joints, aero vs standard bellows style CV boots, etc., etc.
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.