I've used the Damper Doc twice for 235-261's.On my GMC 302 with the damper style like a V-8 I had Dale do the work.I talked to him on the phone and he claimed he had all the original specs for the rubber material,it would be better than new.His prices at the time were slighly less and the tur around was fast.

70 Triumph 650 cc ECTA current record holder