Try the simple stuff, but it's easy to get carried away and start messing with things that have nothing to do with the problem.

I replaced the RD pin, motor and tranny mounts, engine shocks, injector nozzles, and fuel lines and was never able to completely eliminate the shake. I finally decided that the shake was the result of low(er) compression on one cylinder, so I've learned to live with it.

Good Luck

BTW - Autozone has a "Great Neck" 1-1/16 deep socket that works fine on the injectors. 6 bucks