Thanks for all the suggestions.
No indication of twist.
Could not see a part number but doubt it’s other than original.
Don’t have another 5.5 to measure but do have a ’73 6 hp which appears to have the same parts. Maximum dimension from lever end to side cover surface on block is about 2 1/16 on both.
Agree that the "start" "shift" etc positions are only approximate but for someone learning how to run the motor it would be helpful to have them properly aligned, rather than confusingly misaligned.
am