You can certainly buy that garbage from RockAuto (or any other source), if you want to have to do the job again soon.

Write to Johnny @ Polybushings and see if he'll make you a softer-than-usual set of the 2303-2304 mounts.

I think Johnny uses 70-durometer material for those mounts usually. Ask him what the options are for a material that is softer than 70. Tell him you want isolation characteristics similar to the original mounts, but the durability and build quality of his polyurethane ones.

You need new motor mounts, as a priority. This what you describe indicates yours are worn out. This is a serious safety hazard, as well as being bad for many parts of your car. Make a thoughtful decision about what mounts to buy, and go forward with it.

In my case this is a damned if you do and damned if you don't.

When I restored and rebuilt all the suspension and drive train parts on my '64 Valiant convertible about thirteen years ago, the only mounts I could find were Anchor. For a few years they were okay, but eventually they began to "mush'. About a year ago, I ordered a set of Poly mounts from Johnny and had a respected local shop install them. When I started the engine and it dropped to idle speed, I was horrified by dozens of rattles and vibrations I'd never heard before! Everyone said it was normal for poly, and that the new noises would lessen as they broke in. They did lessen somewhat, but I'm embarrassed to sit at a stop light and share the vibrating noises with cars around me that are staring at the neat old convertible. No way will I offer a ride to anyone I wanted the car to impress!

Now, I'm in a quandary. I really dislike driving the car the way it is, but I'd hate to buy Chinese replacements to put it back the way it was. Even if I did go with the foreign parts, I'd have a hard time getting them installed since my local shop was kind enough to install the ones I have now and said they were not interested in working on my obsolete cars again. Since I'm eighty-four-years-old, there are some projects I simply can't do anymore, and regular repair shops won't touch a car the age of mine. The only restoration shop around here apparently doesn't have anyone with Mopar knowledge, and their prices are sky high. The one time I asked them to help me locate a low growl in the driveline, they said they couldn't hear it and after the "fine tuning" they did on the carb and timing, I drove home and reset it by ear so it would start and have normal power,

I don't want to disparage Johnny's product in any way. He was totally above board about poly issues, and the product looks as professional as any big company could produce. The hobby needs more guys like him to keep it going!

I just wanted to share one frustrating experience from an old man who should probably grow up and forget past loves.