if your on a budget I'd wait on things like replacing a steering shaft and coilovers.
Read up on griggs, MM, and here for some good advice. Make sure the stock components are in servicable condition... pay attention to ball joints, bearings, tie rods and bushings. Those are the things that connect you to the road and they need to be good.
Deffinatly do some chassis stiffening, best parts in the world won't help if your whole car is flexing uncontrolled.
Figure out what your gonna do in the rear, I think for RR moneys best spent keeping the back end under control.
Add a set of race springs, HD struts/shocks, Caster/Camber plates and your well on your way.
After that work on your brakes, theres some very affordable upgrades out there.