Actually, the last 8 chassis' I built have used suspension pieces that I have built from scratch. Once you have the jigs made all there is left is the welding. I have never been quite able to justify in my mind the great expense of purchasing what can be built at home. After all Ford did the orignal designs not the current manufacturers. So copy a stock one, maybe improve the anti dive a little, use 3/16" DOM for the a-arms for strength and you just saved a ton of money.