Was looking around at a yard today and found an instrument cluster in a 1978 pick up in pristine condition - no rot or anything. Considering the hassle I had finding one not too long ago for a 76 (had to have the after market base installed etc.) I thought I'd post the find here in case anyone is looking for one.
If I remember correctly, this is a tough part to get without rot but I don't know which models etc it will work on. Sorry I didn't get more info like part number and so on but if I get back up there I'll post again.
What I can report: Cluster from a 1978 F 250. From L to R, Top to Bottom- Oil, Gas, Speedo (Center) Alt and Temp. Sorry I don't have image or more info but was rushing.
Yank-A-Part Poulsbo, WA 360-779-3344 Quoted me $35. Hope this helps.