i junked one once. along with runing 79 aspen 2dr that had ben ditched and the frame bent. I bought it that way took some parts off an junked it for what i paid.
in high school i had a swb 73 van with an 85 /6 904 and im guessing 3.73 or 3.91 gear. it had lots of go and got around 20mpg. i thought that was good for a beat up old van and a heavy foot