Yes the ruler doesn't lie, but no, I couldn't have measured those diagonals without a frame table.
What I did was to get the distance from the front edge of the frame rail to where the K-frame meets the frame rail equal on both sides, and as far back as possible. Then I'm your uncle.
I don't know how I managed to pry the engine/k-frame/transmission back about 1/8" but that was just a part of it.
In the video the engine's shoved to the passenger side, with about 3/8" of shims on the driver side. I should go back and measure the centerline again per that TTI sheet to see if I need to do anything there. Also might end up shuffling things around some due to the torsion bars, not sure right now though.
Keep at it sounds like you're on the right track. This is what sucks about being in different states I have a tram gauge to measure all that . Good luck I hope you find a salution soon. Mike