Your car looks to be in great shape, needing only the stuff any car that sat for a long time needs.
I just have one suggestion- you might want to consider an Edelbrock 1403 (500 cfm) rather than the 1405, especially if the 289 is stock. I had a 600 Holley on mine, and never could get it to run like I wanted. The 1403 gives me very snappy response, and up to 19 MPG on numerous long road trips.
Let me know if you need any info on the heater rebuild- I completely rebuilt mine a few years ago and have source info for all the parts.