It’s easier to list what hasn’t been upgraded on '79 Chev
NAME: Mal Watkins.
Make, model and year of vehicle: 1979 Chev C20 Silverado.
How long have you had it? 32 years.
Where have you been in it? Around Australia, twice.
What upgrades have you done? What hasn't been done is easier to say. Motor, gearbox, etc etc.
Cost: Lots and lots!