The guys who really get, um, detailed
about CJ5 stuff hang out at earlyCJ5.com. Get them a picture, and someone will have the details.
Hardtops were definitely available back then, but were frequently dealer installed options (remember when pickup trucks came with no rear bumper, and they were installed at the dealer?). It makes it tough to state "original" or not, though.
I've never heard of suicide doors, but it's certainly possible.
The top would be metal. This is from the 60's, but it would be close: