I kinda look at it like this, DSE is thriving because the stock GM suspension is garbage. So they are basically the Bill Reilly of the GM world and that is their Alter-K-tion bolt in kit. Its only GM in application not from any of its components. Its a bolt in rack and pinion,coilover suspension with its own engineered pickup points. Plus its a complete front subframe as well.They also just released their 66-70 Mustang setup that is also bolt-in and cast from aluminum in house. I talked with Tom Farrington and his wife last August and they said he just got an E body roller that was his next project.