Thanks for the advice guys.
I'm basing this on my first Part 121 job. I got the interview and they told me there was a B727 sim as part of the interview. So I contacted AA and bought a one hour sim session the day before the interview for $6oo. I had never flown anything bigger than a King Air before, so when I got into the sim (at 2:00 am the night before the interview) I was 5 miles behind the aircraft. The speed and feel was so new to me that I was absolutely lost for the first half hour. After the instructor gave me some tips and good instruction, I was able to fly the last half hour okay.
The next day for the sim ride after the interview, I did fine. Only a couple guys that interviewed when I did were hired also, and they all had jet time, so it was a good investment to buy that one hour of sim time.
I kind of feel like I'm in the same situation as back then.