even today---people seem to have trouble lining up flywheel bolt holes---and the reason is????????
I once saw a guy I worked wih at the airlines take the pulleys off a 6 cyl chryler engine( 3 pulleys) to put them on another engine---he couldn't get them to line up ( typical mopar 6 bolt pattern) and after spending hours trying ended up drilling new holes---these pulleys came off together -----------