I've had 70 'Cuda's with and without. With the way these cars are treated these days rust is NOT an issue (provided we're talking about a fresh installation).

I can appreciate both looks. To me the vinyl top 'desses-up' the car. Sorta like putting a sport jacket on.
A vinyl top also works very well with hi-impact colors (including B5 even though its not technically high impact) as it lessens the flood of color.)

One advantage that nobody has mentioned is that it makes the car MUCH easier to paint!!!----easier to maintain a wet-edge.

Also--not many cars on the road sport a vinyl top compared to years ago--its another difference in our vintage rides verses the millions of everday cars on the road.

One problem I see with the OP's car is that the gloss level of the hood might not match the vinyl gloss very well, and you will have a LOT of Black on the topside of that car.