Nice. And welcome. 79 was a good year for FSJ's. Pretty as-is reliable stock rigs if maintained properly as opposed to modifying/improving(?) them. FSJ floor pans rust out from the inside-out from the painted floor getting wet and not drying out so I personally would NOT install a vinyl or rubber floor covering over new floors. The floors/carpet/backing needs air circulation to dry out. All the vinyl does is trap moisture. Soggy/wet carpet never ends well long term.
I'm no expert but the exterior trim looks almost like a newer (GW era) trim package. Though I don't endorse many mech modes as improvements, I strongly support losing the plastic fake packing crate.