quadratrac

Hey guys, I'm new here, but over the past week I've had problems with my jeep, it'd run phenomenal when it'd first start up for the day but after it runs for a bit and I shut it off to do whatever I'm doing, when I go back it runs just awfully, I'm not sure because my temp gauge doesn't work...

This is my first Jeep ever and I can't wait to get it on the road and off. I'm trying to find a replacement carb for this jeep, but am having a little trouble. I was recently given a Holley List#4548, 450 CFM, 4 barrel, but I am a noob so I don't know if this will work or even if that's a good...