what's the favorite replacment starter for these sixes?

I sold all my date coded big dawg mopar gravel grinders. They were good for their time, and still are on full restorations. I plan to drive my junk a lot if I can ever get it done. I want parts I can easily get replacements for. Sure theres plenty of gravel grinders still out there, but theres also newer, better, lighter, more powerful.