I don't know for sure, as I don't have the info, as far as the changes.
I would suggest the '84 catalog on the Comp TA would be pretty close for the 85's geometry.

The Ironman frame is certainly not an inhibition to hammer time. You pound it and forget it.
I like mine for criteriums and long tri legs as well as anything, and use very stiff wheels for crits.

For long rides, like 100-milers? Well, you'll realize about mile 50 that it's advantage is an efficient uptempo pace, not perched liesurely comfort. Sit back on it, and the handling and ride change a lot, which is a feature of well-balanced frames.

I have never, ever felt any inclination to put a rack, fenders, or carry weight on an Ironman frame. Once you ride one, you realize the balance and agility makes the notion of adding things an instinctive head-shaker. It's almost a shame to carry water or a seat bag, and I resist the water bottle on almost all supported rides.

If you like edgy bikes, you are on the right track. Not harsh, mind you, but a good bit of attitude. Certainly, not the only frame like that out there, but widely available, and with instant membership in the cult.