Just use a piece of all-thread rod the right thread to fit your present pushrod, and cut it off the right length to work. I think the ones I remember working with were 5/16", standard thread. The vacuum tee can be shaped any way you like, as long as it will flow vacuum. I like to use a 30-lb. Freon canister mounted under the cab somewhere as a vacuum reservoir, to allow more than one brake application before running out of vacuum if the engine stalls.
Jerry
