"if there is a Speed week 2921 forum it's not listed on my computer."
John, I think you are looking for 2021 Speed week. And it is there on mine and at the bottom of that section are the build diaries.
Bonneville Salt Flats Discussion
SpeedWeek 2021
At bottom of this section
Build Diaries
Tom G.
PS. Other wise we will have to go to the future and back about 900 years.