Cam Gear Drive?

Hi, Looking for a gear drive for my nostalgia SS Hemi.
Anything to look out for? Pros and cons?
I don´t mind using old stuff here, if I can find one, since they are very durable from what I understand.
Picture is of an old Ramcharger unit from the sixties. Looks like you need a different type of timing chain cover for this one, but I what to use the stock cover and water pump housing.
Give me your thoughts around this.
Thank you.