1964-66 A body Gen 3 motor mounts

Well, you have a nice selection of manifolds there. I have no experience trying to fit these on an early A. I do have experience with 67-76 A fitment. With that being said, none of those work. The SRT car and 5.7 car put the lead pipes into the framerails. The SRT Jeeps are close. I have only tried to fit the passenger side. It would work if you cut off the flannge and rotated it. I forget which way. I have a thread on SRT Jeep Manifolds Do Not Work. Never did try to fit driver side. Only thing I can say for certain is NO FACTORY power steering. The only true bolt in, no cutting, mods required are the 2010-2012 Grand Cherokee and Durango manifolds. The Durangos have the larger outlet and still fit. AGAIN, this is on the 67-76 A-body platform. I really think you're in for some work on this. Especially if you don't want to completely hack the front of that car out. I'm looking forward to some results and an education! Good luck with it and there's people here to help!!