Front brakes locked up

[David from Maine]

Hi everyone,
I am having a problem with my front brakes and need some input to figure it out.
First some background. I rebuilt the front brakes a few years ago with new parts, including a floater kit and new brake drums. They have adjusted and worked fine since I rebuilt them.
I am finishing up some various projects and getting the car ready for the season. I adjusted all of the brakes last week and drove it around the yard. They were all working fine. I washed the car and drove it into the garage and left it for the week, but before I finished up for the day, I tightened the lug nuts to 64 ft lbs as recommended in the Mechanics Handbook.
I started to pull it out of the garage today and found that both front wheels were locked up. I loosened up the brake adjustment wedge for both brakes and one turned freely but the other is still locked up.
Any thoughts on why they suddenly are locked up? Are the lug nuts too tight, which shouldn't affect the brakes, but I guess it is possible. If they are, what foot pound would you recommend that I tighten them too?
Thanks for your assistance.