Wrong dates on GD shows, never!
What Demo tapes are you talking about?
I've been around GDLIVE and find there dates to be goofy at times.
GD were already in the studio as Warlocks in 65.
Pig was found dead on 3/8.
Pig wasn't playing in 73, IIRC. The shows I have from the February run do not have him on there. However, towards the end Kieth was the main man on keys and Pig was only spotlighted for a tune or 2 but basically became a more and more rare stage member after Europe...