who makes best coil over front suspension

Old Man Mopar said
Below is Ehrenberg's prep of an A-body (Duster) steering system for a
previous One-lap.

It doesn't seem that it is exactly stock. Wonder what this mod cost?

http://www.allpar.com/history/mopar/steering-chuck.html

Neat car Mr. Ehrenberg built.

In reading about it elsewhere I saw where he made some significant brake
upgrades as well.

So what was the total cost of his front end modifications?