heyy

Welcome to FABO Gaston.
You can convert to a floor shift, it's straight forward. A lot of 3 speed cars came from the factory with floor shift.
You need:
A shifter with linkage and boot plus trim ring.
A 3 or 4 speed floor hump.
And to do it right, a floor shift column complete to match.
If you have manual steering, the shaft length is different than power steering (it's longer on manual)
Everything else is the same.
An A-833 requires the same except you need the trans and shifter complete, and check your bellhousing for the right bolt pattern. Most V-8 bellhousings have both patterns.
The 4 speed cars had a reverse light on the dash (the bottom near the ash tray) if that matters to you.
Good luck with the build and let us know how it goes.
Yes, pics would be nice!