Be careful when buying springs. I bought a set of Moog's directly from them (the ones they said fit my 1980) and they were way too tall for me. I tried them but it threw my camber out of whack. Thanks to Ford's brilliant stint at no camber adjustments, I was unable to make them work. I ended up putting the originals back on.
1980 F100 Custom. Inline 6. Power steering. 3 on the Column.