I would check them, even though there new, they are stock, most stock BB springs (non-HP) were around 90 on the seat & 200 open pressure, way too weak to handle what you want, your going to need a spring around 120-125 on the seat & 280-300 open pressure.
72Scamp, thanks for the props, How is yours running? Are you running the .484 with stock compression?
This is my old duster with the Ram.
