Replaced motor with another 318 with low miles. New MSD and everything else except carb, used battery, alternator, and could not find a new trans mount. I painted engine, had valve covers and pan off, extremely clean. Ran really good, but had a slight hesitation above 50 so I rebuilt the carb. With a few adjustments it was running great and driven daily. Alternator went, replaced, charged battery, drove fine for many hours on a parts run, left it idling for 30 minutes or so. Got home, shut it off, battery spent. Next day replaced battery, drove to gas station, halfway there wouldn't move, wanted to stall, felt a vibration. Made it, needed gas to get back. Ran better by the time I got home. Checked all plugs, pulled wires apart, re-crimped a few to be sure. Checked firing order, started, ran the same, realized I forgot to plug 1 wire in, ran the same. Starts right up, idles nice, but has a vibration, not water pump, disconnected alternator, not alt, not power steering, no knocking noise, no oil in radiator, no metal in oil, pulled valve covers, all pushrods in place, checked lash but not by the book, just to see if one was way off. Used long screwdriver to ear trick all over engine, nothing detected. Put phone under car, in and out of reverse and drive, trans doesn't budge, mount doesn't move, engine moves a little, rubber mounts new, look fine, bolts tight. Today I checked the oil, a little bit of milky, been sitting over a month, ran it, looks fine. Water comes out the tailpipe at startup, seems excessive, but not green, not sure if it would be, no sweet smell, exhaust looks white-ish but it's cold right now. TTI headers/exhaust if it matters. Water comes out since I put this all together in mid July, but radiator has been the same level since. Vibration can be felt best on tops of fenders in front, and really well on top of air cleaner. Any input is appreciated.