Not trying to steal the thread, but Mike, Your 70 cab looks the same as my 67.
Looks like you have a hand brake coming off the dash. Could that be a PTO lever?
Also what is the round thing on top of the dash/

Back on topic.
Hope the pictures help you out Sweepleader!

Don

1967 GMC 9500 Fire Ladder Truck
"The Flag Pole"
In the Stovebolt Gallery
1946 2-Ton grain truck
1946 3/4-ton pickup,
1953 1-ton pickup
1957 1-ton flatbed dually,
1954 Pontiac Straight Eight
Of all the things I've lost in my life, I miss my mind the most!