I'll bet the Chevy books shown in this thread could answer that question...perhaps the seller or buyer could scan/copy all of the pages as a reference tool for all of us???
**note the 68 book regarding the M22 tranny...only with L78...note the reference in the Corvette section about certain gears only being available with high lift camshaft motors...
https://www.yenko.net/ubbthreads/ubbthrea...uide#Post515962
wilma