If you haven't seen Alex Viada's power lifting / triathlon template, it's worth a look.
His general running and lifting template article
provides much of the background, and his article on variations on this program
includes a program for ironmen triathletes who also lift.
I'm not sufficiently competitive as a lifter or runner to really comment firsthand on this. The general template has worked well for me, although I haven't pushed things hard enough to tell whether the full program would lead to burnout for an old man like me. I suspect it would, but YMMV.