Nice. I had a 52 with 55 235 six and a 57 3.90:1 rear axle. The curved windshield and grill was the give away of it being a 54.
I see it has a small block conversion with an automatic. And a conversion done right,too. Usually, the dash would get butchered by moving the steering column to the left to compensate for the relocated steering box. The adaptation of u-joints in the steering column took care of that.
These trucks rode halfway decent, had a pretty tight turning radius, and a wide cab. I could aim for parking spots that would be tough to hit with Mrs. Cs' Audi and, when my girls were younger, fit four butts in the seat.