OK i THINK .... IF I understand your question .. All of those answers are correct if your enough Mechanic to make it work.
I just put a tilt from a Dodge 1987 RAM cHARGER INTO MY 1988 D250 . It was honestly just plug & play... But it too has a shifter on the column .
... As far as the Chevy ...
OK Here's how im going to explain what I know about that ... Maybe some one will chime in who really knows for sure .
But most of the IDIDIT COLUMN & Flamming River columns made after market us GM plugs on them . SO That could be on way they are telling you to use a CHEVY COLUMN . & aLSO Back in the days there were like 1968 Chevy G10 Vans that had a straight column & 1 in a million was a tilt. You never find it today.
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..... YOU said yours has a floor shifter .. SO ON My 1972 BRONCO with a 4 speed NP435 IN THE FLOOR . I installed a 1978 FORD P/U TILT Column ... But I cut the Automatic stuff off the column & covered the holes with Bondo .. Sanded it & painted it BLACK & I Have a slick column & a floor shifter .
I hope that entices someone else to step up & answer with more knowledge .