GM did it from the factory on the 1969 Z/28 302 . I also had an L-88 427 that came with the floating pins and no bushings. As said above adding an 1/8" hole with a chamfer was a popular mod. My $.02
Mark
1996 Ram 1500 Sport 1968 road runner 1952 Sears Allstate licensed, pump gas, Hemi 5.98 @ 115.73 1.33 60 ft. The best is yet to come. Painless Performance / Street RODDER magazine Top 100 for 2019
