1996 K1500
keep the 350 and 5 speed
add F44 (upgraded rear diff, better rear brakes, stiffer rear springs)
3.73 rear instead of 3.42
manual windows and locks
delete Z71
add factory trailer package
might go down a trim level to get rubber floors, if I could keep the power seat
add 3rd door
On my 1999 911 I would so much prefer the lighter weight and extra headroom of the sunroof delete. LSD and a better color would've been cool, but those things are easier to change than reskinning the roof.
Volvo: 17" wheels. Not even sure if the 18" it was equipped with were optional or standard equipment, but I know the 17" wheels existed, so let's call it a maybe.
Mazda: The '84 would have been nice to have had power steering. I fixed that a month after I got it. The '81 is basically perfect as is, within the constraints of what was optional at the time.
2022 BRZ
I'd add a passenger seat that raises and lowers. It doesn't and my 4'11" wife gets car sick at the stock seat height. I'm looking to see if a drivers seat from a right hand drive car can be bought/installed. No I won't get a pillow for her to sit on.
2000 Mazda Protege - wait 3 years and get a Mazdaspeed Protege instead.
2000 Chevy Tracker 2dr - 4x4 rather than 2wd