I would try replacing the dogbone motor mount. It's easy and not expensive.

Another suggestion is to clean the EGR ports, if this has never been done. The rpm range of ~1700 is where the EGR opens under moderate acceleration. If some of the ports are blocked, the EGR opening will overlean a remaining open port and you'll get a lean miss which might feel like a shudder, but is usually described as a "flat spot" or lag in acceleration. However, the missing mount might cause the shudder at this engine speed.

Your experience w/ CV shafts reminded a recent revelation I had on CV shafts. My daughter's 97 CL 2.2L had a bad boot on LF shaft. She needed her car badly and I had to do the job on the weekend. After some problems locating a shaft (I buggered the shaft end threads to remove the shaft from hub), I determined to simply replace the boot and redress the shaft threads. One 1/2 shaft from a reliable local auto parts store was so stiff I couldn't deflect the joint. I called a CV jt repair shop and asked if they would replace the boot and fix the threads on my shaft. They agreed and went by the shop. I asked to watch the operation and it was accomplished in about 10 minutes total. The cut the old boot, slammed the joint down through a table w/ a hole in the top and separated a snap jt in the CV jt, wiped old grease off, slapped some new grease on, and reassembled. He had a neat split thread die mounted on vise grip pliers that clamped on the damaged shaft threads and chased them in a few more seonds.

While standing in the shop, I noted hundreds of CV jts stacked around the shop w/ new boots installed. I realized this shop is one of the sources of "rebuilt CV jts". I'm sure that no matter the condition the CV jt, it would get the same "rebuild procedure" that I witnessed for my boot replacement. This confirmed my suspicions about chain store CV jts. Avoid them like the plague. This place was a real Houston sweatshop likely paying hardworking guys by the unit to "rebuild" CV jts. The guy who repaired my CV jt was the foreman and was probably 18 yrs old.

good luck