We have two different part numbers for this. The only difference between the two numbers is the length of the hose that you receive.
EG2591 is listed for the 65-66 Mustang. With this kit, you receive 29 inches of hose. You actually need about 28 1/4 inches. Click here or on the part number to order.
EG2592 is listed for the 67-70 Mustang. This kit has 36 inches of hose. There were several different radiators in this range of years, so the extra length here may be needed. Click here or on the part number to order.