You are my NEW HERO!!!!
I started in business Dec. 1983. My second or third car purchase was a black/red 64 Impala totally loaded 425HP 4-speed station wagon. Then I bought a 65 340HP 409 gold with beige top .CA built rust free and running station wagon. Inside side the back was all torn up because the owner carried firewood!!!!! Then later on found an all original white/blue 62 Belair 380HP 409 .....CA built, rust free with original engine and trans. (THANK YOU TEXAS!!!!!!!). I never could find a 63 4-speed wagon......all were powerglides and I wanted all 4-speeds!!
You have a standard 340 air cleaner and I see you have AC....that requires a short snorkel air cleaner.
Love your car!!!