Unfortunately the answer to your question is ‘none’… Right now you have a later Mk3 Spitfire (or TR4-6) windscreen frame. As others have mentioned you need the right capping, part 806189, https://www.canleyclassics.com/?catalogue=triumph-spitfire-mki/ii&diagram=triumph-spitfire-mki/ii-body-mouldings-tonneau-cover-details-and-hood-assembly is available. But do you have the soft top frame and the clips (number 8 in the link) that fit to the rear deck? The frame won’t be too hard to find second hand, in the U.K. at least, but the clips are hard to get.
Fitting a later mk3 style folding hood is not impossible, but it would require a lot of work and modifying the body.