The slant/904 drivetrain is out, the car is in for paint. The small block/727 setup is waiting to go in. Does any of the 904 shift linkage fit the 727? It's a 72 Swinger.
I recently did the same swap and the only thing I had to modify was the bracket that bolted to the bellhousing for the bell crank pivot, I also did not use a kickdown linkage , but used a cable setup instead, hope this helps.