I currently run a QA1 setup on my car and I thinking about switching over to an AFCO DA with the coil over setup. I have a 74 nova. Has anybody used this setup on there stock front end suspension car? Based on some of the recommendation on the website, it states that I would need to use a 7-8 inch spring with it and a 400 lbs spring which seems like alot. Just looking for feedback.