You have to be INSANE to have long-tube headers on a big-block A-body Mopar!

Now, then....make note that in most cases there is some interference between the block and the battery posts. Due to some unknown reasons, there will be lots of smoke and some sparks if those two come in contact with each other.

There are various ways to solve this, but here is one. I've not used this part but it looks OK.

Mopar mini starter conversion/relocation terminals | eBay