I have done the four speed similar to Hotrod Lincoln, on a 71 Blazer. Chained under it and looped chain over a bar which had one end on a board on the dash and levered it. We did it that way so as to sling it and have it slide back off the spline. Also during installation we had up and down, and back and forth movement. You can use a modification of this according to your situation. I think we left the shifter on to control "roll". Just a thought.

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