All good info so thanks. The general thing I was missing was forgetting about the AMC 360 so when I saw a wagoneer in the local wrecking yard inventory and it had a 5.9 it got me thinking. Wrong version though so it's a non-starter. I'm glad I asked here before wasting my time.
Way more productive wasting everyone else's time :poke:
In all seriousness I always feel pretty blessed to have such a collection of people willing to share what they know.