Putting a modern rear axle in an a body?

factory style setup using iron calipers w/e brakes $560
http://cgi.ebay.com/ebaymotors/MOPA...r_Truck_Parts_Accessories&hash=item230550a573

$600 Aerospace Components...all billet! no e brake....use a line lock
http://cgi.ebay.com/ebaymotors/Aero...iewItem&pt=Race_Car_Parts&hash=item4ce722e4bc

Wilwood $650 no e brake
http://cgi.ebay.com/ebaymotors/Mopa...r_Truck_Parts_Accessories&hash=item4cee419ccf

Here's the one! $650
Brand New Wilwood Rear Parking Brake, Pro Series Forged Dynalite, Bolt-On 12.19" Disc Brake Kit (Part #140-7144) for Both Rear Wheels.
http://cgi.ebay.com/ebaymotors/WILW...r_Truck_Parts_Accessories&hash=item439f882d92