What are some car-repair jobs you always wished you could do but have never
done?

Mine are, in this order of "I wish I could do it" order
1. painting
2. alignment
3. replace/rebuild engine
4. clutch replacement
5. tire mounting and balancing
6. timing belt
7. head gasket and vcg

I've done electrical, brakes, shocks, cooling systems, alternators,
ujoints, pitman/idler arms & tie-rod ends and ball joints, tuneups,
emissions hoses and sensors, exhaust, electrical components, fuel pumps,
and fluids, but not the six things above.

What are some car-repair jobs you always wished you could do but have never
done?