It's an old MTB which is actually well suited as a road bike - long wheelbase, relaxed angle, 42" stays, brazeons for racks and fenders. It's not the lightest, but it's chromo, and I like steel over aluminium.
As for the chainset. I'm pretty sure it's Acerta. The rest of the groupset is. It dates from the mid-90s.
The bottom bracket is 4cm, and the smallest chainring is not flush with the back of the crankarm. It is closer to the bike, like a road chainset (or rather, like the chainsets on the two roadbikes I have - both two ring).
All the three ring chainsets I've tried are flush with the back of the crank arm, and are further out on the biggest ring. This means the changer cannot push the chain onto it (I've checked, and yes I have it at it's full extension; little screw out as far as it will go).
I can go with a road chainset, but I'd rather have a three ring affair.
The bottom bracket is shimano and measures.