You have to be INSANE to have long-tube headers on a big-block A-body Mopar!
What ever you do make damn sure you test that new mini starter before you install it!
An even smaller starter I believe is needed for a BB with an 11" bell housing and TTI long tubes. Maybe that starter could make starter R&R more digestible when/if needed.
Accessibility is the one solid advantage with FWs.