440 with Indy SR heads - what headers
You’re correct.
I was looking at a TTi application listing on a different site, not TTi.
Just shows you really need to do your homework.
However, as I stated earlier, I do know two people who used the Pro Parts headers in Dusters with raised port Indy heads on RB blocks.
I don’t know if they dropped right in, or if there were some mods required.