The rating on most of those chains is plenty strong for almost any normal drag bike. The driveline one is on at least a few 10 mil DMs , the DID, EK, RK have many users and hold up fine when the frame, motor, and swingarm are solid. FAST sells a bulk chain by the foot that is good and not much money per foot. Some of the strongest chains can be the first to break due to shock. Get something 7800lb or more and keep it oiled well. I have broke a chain but only when the motor was tweaking and you could feel the chain jerk under a hard load when it got sandy. That wasnt the chains fault.