just guessing here as I don't know what the corral times are but
43 min x 2 + 5min = 91 min give or take.
don't get in with the <60 min group so just get in with the 80-90 min groups and go from there.
enjoy the day and have a great 1st IM.

+1 on Avago's suggestion. Pretty simple really. I did my first IM last year (Tahoe) and had no illusions that I was going to somehow get faster on race day. Based on my LC and pool swims, I knew which 10 minute corral to line up. I added a few minutes to that as well because I knew I wouldn't be able to hold my LC pace for IM distance. It worked because I didn't find myself swimming over anyone nor was I swum over. Good luck and enjoy the day. It goes by fast.

Line up in the 1:21-1:30 coral. The majority of people last year were pretty realistic in terms of the self seeding. If anything, some seeded a little too aggressively as I passed some on the second loop. I swim about the same as you, seeded myself appropriately last year, and did 1:24. Wasn't really swam over at all, although I was a little surprised regarding the amount of contact at the start of the second loop. Everybody re entered the water and made a bee line for the cable.

Have fun, good luck, and I will see you at bike special needs drop off bright and early Sunday morning!

Thanks everyone!