Fiberglass hardtop
 

What all would I need to install one?

The Porsche sold hardtop was aluminum IIRC and the device your car would need would be called "a set of spinlocks".

How any fiberglass hardtops install might be asked in a racing forum as they are often used there for their weight savings.

Thanks for the reply I was aware of the spin locks just not sure how the fiberglass ones were mounted if not the same.

The ones I've seen on race cars are attached to the roll cage at multiple locations. They are typically pretty flexible. I imagine they would need some sort of internal frame to stiffen them up for mounting to stock locations.

The fiberglass hardtops also don't have window seals. If you've got a street car with an interior, it's not what you want.

I posted pic's of race car installation in the cross-post in the Racing section.