I'd debate the wisdom of re-using 10mm flywheel bolts.
Unlike the later 11mm flywheel bolts, the 10mm bolts as fitted to the /5 and the first two years of the /6 are designed to stretch.
'76 R90S silver smoke
'75 R90/6 hybrid
"Don't worry, it's not loaded."
last words of Chicago's Terry Kath before shooting himself in 1978