Hello from SE FL. Retired but been collecting and shooting since about age 10. I just added an Inland M1 carbine and found this site while looking for info on checking out all the parts markings. It is serial # 67328XX and Inland barrel dated 1-45.
Welcome to the forums. Your barrel date and serial number show that the barrel is original to the receiver. It should have the latest updates on it when it was first made by Inland. Should be a good shooter.