Im not an AMC guru...lol. But I know the brands with the oil pump in timing covers do have issues on a regular basis. Some of the noises you're hearing are because the engine was never designed to run what you want to, plus there wear that a rebuild doesnt help, like lifter bores and the clearances of the oil pump housing. So if you want to run thin oil, I think it has the protection the engine needs... but it might "just be noisey".
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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