Slightly off topic, but for those of you who have done practical mechanic training at Sesto Calende on the Maintenance Trainer, you have already seen the dry run MGB for the 139.
After running with oil, then being completely drained, it was run dry for 30 minutes, inspected and then run for another 30 minutes.
Paint blistered off the inputs (mind you they are spinning at over 20,000RPM!) and turned all nasty brown colours on a lot of the casing, but the MGB stayed together.
A coat of paint and it was put into the maintenance simulator.
If you do work on it, pull the frewheel and have a look at the bearings. They sure do look like they go hot, which is no surprise!!!
Well done on the 189 MGB!