For a 3" lift I think this pretty close to what Matt is or was using.
OME HD springs up front
Bilstien adjustable lowest setting up front. You can then measure your hub to fender length and see if you can lift it a little higher. I think 23" is the magic number somewhere around their I'd have to look that up though.
Super lift springs rear. I like a slight rake to the front and I think its functional for towing as well. Or OME with some spacers.
Bilstien rear shocks or Fox 2.0 shocks. You want extended length of at least 28" for wheel travel.
The rear only takes minuets to unbolt the sway bar. With this setup you could run without a rear sway bar or get disconnects
Rusty's adjustable track bar. This is to keep your DS off the fuel tank.
Maybe do the lower ball joint while things are apart and also a good time to paint stuff
You might need a 1" spacer on the driver side rear to compensate for the fuel tank weight. But that can be added easily down the road.
Move the rear brake passenger side brake line bracket. Or get extended ones. The driver side probably don't need it but confirm this on your XK.
Fuel tank modification to add room for the control arm to drop more.
Pinch weld mod
Please take hub to fender measurements before you lift you XK
Not sure If I missed anything but if I think of something I'll edited it in. Or Matt can just yell at me