4 speed in A-body
Here's a pic of the clamps that you're trying to get the shifter handle past....
View attachment Pistol Grip Shifter Clamps.jpg
Put the assembly in a vise and as mentioned, use 2 long feeler gauges or very thin strips of metal to release the handle.....
View attachment Pistol Grip Shifter Slip In 004 (Small).jpg
View attachment Pistol Grip Shifter Slip In 010 (Small).jpg
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