I like Hamwich's approach. I have a huge amount of experience with attempting to improve Morgan Suspension. I have installed the "SUPLEX Kit", MULFAB Thrust Bearing, Rutherford Rear Springs, Hard Chromed King Pins, Vesconite and Devol Bushes as well as Bronze. But frankly know very little. With 3 Morgans I have 3 sets of problems. Some work and some are a disaster. All 3 have modern Morgan Seats. My first line of defense. Good tires at 22 PSI. Chain Oil on rear springs, Hard Chrome King Pins, Well greased fronts, Thrust Bearings under the main spring and rebounds cut Per Peter Ballard's suggestion. I recently installed AVO/Rutherford shocks on My +8 at lowest setting. They were an improvement. They replaced very old Koni's. My advice would be #1: To get your present setup up to Spec's first.