I think you got the sister car to mine!
Yours is the first stock 250 I've seen that looks like it is in better shape than mine was when I got it. Usually they aren't as well cared for.
You can always do a couple of bolt-ons to make the 250 better: HEI, Clifford or Langdon headers, Offy or Clifford intake, Holley 390 CFM 4bbl. All can be swapped back to original parts in a weekend if you go this route.
Here's my engine with an Offy heated intake, Langdon split headers, Holly 0-8007 390 CFM carb, and some chrome. She goes pretty good now too. Haven't tried it yet but I'm positive I can keep up with or even pass a stock 327.
I only see a couple of slight differences (besides the obvious). You have a different upper radiator hose. Mine was a PITA to find at the autoparts store. I could have probably much more easily gone your route and it would work fine. Another I see are the wires on the driver's side wheel well. All the 250's I've seen have those tucked into the fender like mine. I went a bit further, however, and lengthened some others on the other side and tucked them as well. Still have more to go but eventually I'd like to have all the wires hidden and even the heater hoses. That's a project for next spring. I might even re-route the lines, etc, along the firewall through the underside of the dash.
In mine I figure it's a 6. I might as well make it how I want it, right? It's not a Z28 or anything...
If you get a moment can you take a pic of your motor mounts? I'm fighting a self-imposed issue there and I'm curious if yours are stock or if they came up with something better.
Nice car! Welcome aboard! We now have a whopping 4
6 cylinder cars here!