Whelp, I'm wrong then
Crazy though.. I've never ever heard of the 4.3 v8 being used in the 80s, even Wikipedia says it wasn't used.
Learn something new every day. 2 things today honestly... the other being that buick&olds used a 3.6L all aluminum v8 for a few years back in the day.. it was even factory turbod in the olds. Want to buy one now. That's just too cool to me.. a little American v8... America's all about 5-6-7 liter v8s.. not tiny ones.
Ford had a 3.4L all aluminum V8 for a couple years.