KYB Extended Travel Rear IRS Shock Absorber, '69+ Rear Type 1If you are looking to extend the travel of your stock rear IRS supension, this shock absorber is just thie ticket. It has very good ride characteristics and will hold up to abuse. It is 18" center to center, and provides approximately 10 1 2" of wheel travel when mounted in the stock location. You will need to notch your spring plates and or cut off your bump stops to achieve maximum travel, as well as using Type 4 or 930 CV joints. Sold each