New steering/front suspension in truck

Thinking about putting an A arm/rack/pinion system in my truck project. What is a good vehicle to get the donor parts from?

Alan

I am going to use the front end out of a late 80s mazda rx7 the 5 lug pattern to put under my ranger they have aluminum lower a-arms billit spendles and a 4 piston brake cal and get the coil over kit for a mustang for the springs
http://www.ebay.com/itm/79-04-MUSTANG-BILLET-FRONT-COIL-OVER-KIT-QA1-COBRA-93-/180877497416?pt=Motors_Car_Truck_Parts_Accessories&hash=item2a1d239448&vxp=mtr

I got everything to do it with but the coil over kit this is going to be this winters upgrade to mine plus the rotors are cheap and brake pads