O.K., I have tried it with fishing lead shot.
I choose 2 small balls of 1.9 mm diam.(.075") and fixed them with a drop of oil parallel to the lower shell's oil groove.
Torque and yes, I did some turns on the flywheel to feel the resistance.
There was some now!
Disassemble and find them squished to 6 mm across (1/4 ") and .11 mm thickness (.004 ")
Both nice and same picture.
They did leave a mark, though in the babbit! Won't do any harm, but it shows lead is not plastigauge ...
From the depth of the mark I can guess that the clearance is .075 mm o.k.
Torqued again and pins into the castles.
I made some pics but I am too silly to upload them into the Lister Engine Gallery.
If anybody wants to see them, help me.
Rolf