Make sure you clean out the allen bolts, or else risk rounding then out! Don't ask how I know!!
I replaced the left mount and both engine shocks a month ago, and had to leave the right side in until Sunday. I just got the right side finished on my 300D. I replaced the lower 8mm bolts with new ones, so I'm good to go.
Also, use a 3 or 5 pound sledge and give the bottom bolts a good whack with an 8mm allen it it. It sure helped me out, even though I had to use extractors I bought from Snap-on. I am currently working on making a "fork" to hold the engine shock shafts, and all my wrenches are too thick to slide into the notch. I'll post how I did it when I get done.