Keith,
see attached specifications for a gin pole plus an elevation detail drawing I made to illustrate an Ensign Gin pole.
I used a 420 mast, but added approximately 2' with a piece of 4" PVC pipe connected to a wood base.
I will measure the length on my next trip to HYC.
John
John E. Cutler
Past Commodore Ensign Class Association
#1029 - the other woman