Re: Heavy front brake drag.
If the spacers check out OK, and the bounce trick doesn't help, you may be experiencing something I just went through.
After a minor off-road excursion at Buttonwillow (no crash, just some dirt ridin', my brakes started doing exactly what you describe. *I tried both of the above ideas, but no luck. *Now, I know you just changed lines and bled the brakes and in the process, you probably pushed the pads and therefore the pistons back into their bores. *If you didn't clean around the pistons before doing this, it can contaminate the seals with dirt/crud which will then keep the pistons from retracting properly from the rotors after applying the brakes.
My calipers were dirty from off-roading, and when I swapped lines it created part of my problem with the brakes dragging. *The other part was a very hot day at Buttonwillow (just under 100) that helped my pads to embed quite a bit of their material into the rotor surface, causing lots of friction between pad/rotor.
The fix was to rebuild the calipers with new seals to remove the contamination and use Scotch-brite & acetone to scrub the rotors clean on both sides. *Also, I installed some new pads at the same time. *Problem solved. *The front wheel now spins like new.
As this was a bit of work to remedy, I hope that you are successful with the bounce trick. *But if it doesn't help, you might try the caliper rebuild with pads and scrub the rotors clean.
Best of luck to you.