Keep it. It's better to have it & not need it than it is to need it an not have it. For me, I NEED to have something fun to drive to release tension. It's an outlet for me. You'll find time for a nice drive at some point. Actually, why not specifically go & make time for it? Get on a local board & meet up for a cruise or something.
I do relate though. I get the feeling every so often that I'm too old for a 240 and that I should get something more mature. Something that's not synonymous with teenage drift-kid ricers. But I'll stick with disposably priced 90's cars so I won't get to sad if I tear them up. Just when I think of switching to an MR2 turbo or Z32TT, some new S-Chassis R&D pops up and makes me reconsider.
Right now, ppl are bolting 350Z 6spd transmissions to SR's & 1/2JZ's. That alone is keeping me interested in our cheap platform at the ripe old age of 34. But I can't imagine how much effort you sank into building an N/A KA with 200hp...

I might feel the same as you if I made that decision. Finishing that project would feel like a pyrrhic victory to me.
Your car feels less tossable now? Take a page out of the FRS/BRZ's playbook and put some skinny Prius tires on it...
