I think your doing good and while you have room for improvements I would t get all upset and crazy about it much. Go hunting for quicker times and the best launch & tune you can find. There is a lot in suspension.
I do see the heads improving your set up to your goals BUT also see more expense than just the purchase price and gaskets. Once you have the heads in hand, it would be my advice to have them checked out and adjusted as needed and spend extra coin to port the bowls for added low lift flow.
Between the heads, tuning and suspension work, I’d bet 1/2 a second drop. No problem. Just a search to ge there.
What’s the cars weight?
Thanks for the video! That was cool.