Not into the lowrider wheels. What to do?

Hey all, I just got this ‘79 smogged and tagged after it’s been sitting since ‘08 near Palm Springs. Now, I’ve brought it to the SoCal beach and while it is in classic lowrider territory, I’m just not into it. Maybe if the paint and chrome was immaculate, but it’s not and I don’t plan on making it so.

So what do you think these are worth? And what’s the stock wheel size? Or better yet, what wheel size is best for fuel economy? I know I know, it’s not economical driving one of these. Looking for advice, thanks.