Magnum 318/5.2L Swap (Carbureted) - Stock serpentine alternator set-up?

Revisiting.....

I first have to state, I made 2 mistakes and the first one I don't think is a issue but the car is a '79 Magnum, but here is the issue. I'm having issues charging. I first stated no issues. And that was true since I had just done it and all seemed fine. But that has not been the case after a while.

The above video & wiring diagrams, is it for with use with the computer? Or no computer?