1986F150Six wrote
I have never seen these before...
I'm familiar with these since I rebuilt my 3-on-the-tree manual when I first got the truck.
You can see the old spacer here when I took mine apart...
And you can see the new one installed here between the two shifter arms. I believe there are two spacers in there if I recall correctly.
1994 F150 4x2 Flareside. 5.0 w/MAF, 4R70W, stock.
1984 F150 4X2 Flareside. Mild 302 w/ 5spd. Sold.
1980 F150 4X4 Flareside. 300i6 w/ 5spd. Sold in 2021.
1980 F100 4X2 Flareside. 351w/2bbl w/NP435. Sold in 1995