The barn find config might be one of the coolest and most entertaining configs I've ever seen on beamng
Cool thing. Really convincing driving experience! And it’s been some time since I’ve been impressed with a mod.
It seems you've already covered both trim categories (the Custom seems to have not been made in '73) but it would still be good to have more than two stock factory configs showcasing the wide range of possible trim, powertrain and option package combinations; a full list can be found here: https://www.automobile-catalog.com/model/oldsmobile/88_7gen.html#gsc.tab=0. I was also about to ask about the six-cylinder engine but it looks like that wasn't an option in real life.
I don't mean to be annoying, but me and some other guy said the shifter is bugged so that it goes backwards. Like, putting it in drive is the park position.