I would think you could hook up most of the dash stuff. At least you should be able to find places to stick the stock oil and coolant sensors. This is if he didn't hack that wiring off.
Interestingly, the guy said a 1987 dash would bolt in place of the 78 dash and hook up to everything.
-Karl
2006 Chevy K3500 4X4 - No J.B. Weld on it yet!
1982 thru 94 F-Series "The Klogger" AKA Transport on the road, on the trail, or on the trailer!
1965 Chevelle
1975 Corvette