Nice install on the '65. I can see now how the hood will close. Because of the vintage I'm leaning toward early "A" body. They are 1-5/8" tubes also. You can put exhaust on them. Buy 3" 45 degree bends or a 180 degree bend and make you're own extension to get the end of the header under the body. They are O.B.O. Shipping is not inexpensive.