Yep, it's just a thin shim that fits between the back of the upper rope seal and the block. Then the main bearing cap is tightened in small increments as the rope forms itself to the crankshaft contour.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!