I’d go for u-turn pikes up front – seem to remeber that .243 did 2 versions of those frames, one for short and one for long travel so the U-turn would mean it would be OK whichever one you have.
Wheel wise, something with 521 rims (or whatever they’re called now) or sun singletracks. A single 36t ring up front with some kind of chain device – truvativ box guides are good on a budget, E13 if you’re flush. Short cage rear mech. Stick a set of fairly wide OS bars and a shortish stem to match up front with a set of lock-on grips. Brakes are quite a personal issue, but I’m very happy with Shimano LXs on a similar speced bike… very cheap too…