1961-65 new Heavy Duty Premium Dual Master Cylinder conversion kit, F/C trucks and vans. There is it, for those who want the added safety of a dual master cylinder, whether you are running stock brakes, or upgrading to disc brakes, this kit will do it: includes the dual master cylinder, 2 fittings for the stock brake lines. You will need to purchase the rest of the needed brake lines to finish the conversion, easily found at your local Autoparts. I have done this conversion in my 61 Rampside when I added front disc brakes, wow, what a difference! don't hesitate to call Rafee at 918-413-1548 with any questions you might have about this item.