Both of mine are mostly original. I did change the seats in the Vette to full leather covers instead of the crappy leather inserts on vinyl bolsters that GM used. The vinyl always split where it met the leather. Also put a fiberglas leaf spring and stabilizer bar on the rear. Upgraded front suspension as well. Gave it a better ride and handling. She only has 18,700 miles, so I don’t drive it much. I have had it for 25 years and tracked down the second owner, who is friends with the original owner and vouches for the accuracy of the mileage. It was never a daily driver. I even had a log book in the car with all maintenance records and repairs prior to when I bought it. It needs TLC but it is drivable. I only wish it was a 73 or older, because then it would be worth some money.

79 was not a great year for any American made sports car, but I had a 79 back in 79 and a 74 before that. Also had an 81. So the late 70s and early 80s is what I drove back in the day. I always liked the C3 body style.
The El Camino has 48,000 miles and my dad had the car since 1980, so I am certain it was properly cared for. It needs a little TLC also, but still in really good condition. Cleans up nicely. If I can ever get past the hurricane repairs and aquarium re-start, that is what I want to get on.