Early Motor mounts...

Yes. I did so to get more hood clearance for a Magnum beer-keg intake in my 65 Dart w/ 273. I had to hog out one hole and install them at a slight angle. But, the thin mounts caused K-frame interference with the Federal power steering pump I had to change to because of the later alum water pump I used, so I went back to the thick mounts. No issue w/ original TRW p.s. pump. You might need to lower the tranny mount to match (how?) and change the "pinion angle" of the rear differential to match your new engine driveline angle (otherwise driveline vibrations). If you have a radiator shroud, insure the fan won't interfere.