No overheat problems runs great 194 deg temp running.
Went out with wife to SHOW OFF the P38 since it is running so well. Had A/C on and then the Blower shut off, the front windows stopped working and the cigar lighter lost power. Had GPS in the lighter and tried to put down the windows when the A/C/ quit. Wife looked at me laughed and told me how happy she was with her 1992 Blazer she just bought. Well we hit a pot hole. South Carolina Size the only thing that SC has that is Bugger than Texas, and everything started working again.
LUCAS or just chalk it up to a P38?

 

Mr. George, would look at the under hood fuses and fuse links that bolt in, perhaps one has worked loose, they can run multiple things down stream. Could also be a ground strap somewhere that is loose (block to frame and others).

 

Mr. George, here's pix of some of the internal grounds, you'll find them in places like under the kick panels, and the passenger seat.

 

Make sure the ignition switch is not stuck in the crank position or (position 3)
This will take out the hvac and radio for sure and most likely the windows and lighter.
Try wiggling the key next time it happens.

 

Since engine was replaced I am taking it to THEM to check all their points then I will dive in. Ground makes great sense.
Tried the key thing but that was not it. It has NOT done anything since Saturday and I have put another 300 miles running back and forth to the land.