I can’t remember the first one, but I do remember building several Jeep CJ-7s, corvettes and trans ams... I apparently didn’t get real good taste in cars until HS when I bought my 914!
I was still building models through HS and a few years after, but graduated to exotic cars and Porsches.
Liked Monogram in my younger years and then Testors later on and been stocking up on old Testors for my retirement in a few years or if I get my other home projects done, which ever comes first.