Wow. An efficient 13-second quarter probably needs an M50.
Swapping another M20 and boosting it would work, but there's just so much more potential in a newer engine, especially for extreme goals like those. The S/M50/2 swaps are well documented all over the place, as is the Eta to turbo-i
But. For general romping about, a Conforti chip and a solid suspension will wake that car right
up. Good luck.