I've seen this done before (besides the pic posted here) at another forum some time ago. You'll need some plastic forming skills. The dash, as mentioned, from the newer truck is dramatically deeper then the stock 73-87 dash. As I recall, the newer dash is also slightly wider...but I don't completely remember the particulars. Personally, I thought putting the newer dash in these trucks looked funky, especially when the doors are open. The newer dash sticks out a lot further then the original 73-87 dash (I believe around 6" further..or at least that's how far it looks like). I do recall the guy who did it said the wiring was a real pain...mostly integrating the newer air conditioning controls to the original 73-87 a/c equipment.