Josh,
Just for fun I downloaded your file MK4KBASC and transferred it to my Altair with your 8080 CPU board. The file transferred ok and I could launch the 4K Basic. However, I couldn't figure out what some of the questions were. I never got the program to get past the initial questions - I would eventually get an error.
Did you get that far?
I was successful with MBASIC.COM. That runs fine on the Altair.
Harold