Could it be an export gauge setup put in later in life before 1984? (not sure gauges were offered in export or why they would be different.
The cowl tag says bench seat, but the rest of the numbers appear clearly odd from Warrens page.... at least what I can tell from that page?

Interesting non the less. appears to be F-40 by front sway bar and rear track bar being small on each end, no sign of ever having a sway bar, tach gauge speedo by turn signals, and where the tach is does have the "brake" light unlike the clock delete.

Would export be in RPM's may be a reason? but I think I have seen these gauges at one time in a 67 in pics, one fender shows BB but cannot read it, even blowing it up, so it could of been even a 327 small block car w/T-400 because of 12 bolt, PDB appear right with the 15 inch wheels semi complete, rough unit non the less.

Bill