A stent graft for animal or human implantation and method of delivery thereof. The device stent graft employs a first component having an axial passage communicating with the axial cavities of a cuff and longer first leg. A separate leg extension is engageable to an aperture in the distal end of the cuff. A first catheter engages the first component for translation to the implantation site along a first guide wire. A guide member communicating through the first component and extending from the distal end of a second catheter and adapted for slidable contact along the first guide wire when pushed by a translatable core shaft extending from the first catheter, or by the second catheter, is provided as a pre-positioned guide for subsequent engagement of the leg extension to the aperture in the distal end of the cuff. Translation of the core shaft while in contact with the guide member pulls a third guide engaged with the second catheter into the cuff to provide a track for proper and speedy positioning and engagement of the leg extension with the cuff.
