No the column shift unit is different. Well I should say the mounting position is different. The bell housing bolt pattern on the floorshift unit allows the tranny itself to lean to the driverside allowing the unit to be mounted with out a hump. Also floor shift unit ha a bracketmount cast to the tail housing with threaded holes to accommodate mounting of another bracket known as the link. This link and link bracket allow the linkage rods to run under the tranny cross member support. Hard to visualize till you see it together. It's the exact floorshift system used on the 60 and 61 A bodies but never made or used for 62's. Well now there is one. Gonna see how it all works tomorrow or Tuesday.
Can't find the support for shifter but thanks to Bill Crowell I have pics of one so I will fabricate one.
I think if you look thru the posts you will see this bracket in diagrams, defined as shifter support.
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MLP