I believe the 1989 to 2001 FLH-FLT take the same Trike swingarm.
As I stated above, the same pivot pin, trans/swingarm bushings and trans mount bushings. I know it will work back to 1989.
It may even fit back to 1985 with slight modifications.
Just curious, I had to beef up the top motor mounts on my 1989 Tour glide, Did you do the same or is it strong enough as the newer ones are?