You have to be INSANE to have long-tube headers on a big-block A-body Mopar!
I have the same headers* on my car, 68 cuda. I've had them since 1990 or so. The starter is a bit of work to get in and out....but at some point I switched to a mini starter and it's no big deal now. In 2020, there is simply no reason to use an original type starter.
*Mine are CPPA which were later morphed into TTI