Quarterwave wrote
Question - did you need a pipe/breaker bar to get them off?
No sir, I'm up here in the land of rust. That bolt and nut(s) was never coming apart on the threads. If I recall correctly, I split the side of the nut with a drill. Drilled a couple holes into the side of the nut through the spring coils, and then split the nut with a hammer and chisel.
I installed new radius arms (Dorman), and new bolts/nuts (from LMC).
If the threads on your bolts look decent, start soaking them down with penetrating oil I guess.
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