howlnmad, you are right and for that, thank you, as I am very happy you proved me wrong.
Lumberjack your Drawing Numbers are all consistent with a IHC made rifle, while it is hard to find proven factual data on all the different serial numbers and dates they entered service and so forth, I can only tell you my educated opinion. While the link on here for the article on American Rifle Magazine is a great read, a lot of the data in the article, it seems they got most of their facts from the same place, have a look at this webpage article,
International Harvester's Post-WWII M1 Garand Rifles/, I think you will see that they have quite a bit of similarities. I don't believe it is from plagiarism, but instead that, it is really hard to find proven factual data on all the different serial numbers, drawing numbers, heat codes, etc. But your rifle looks to be made by almost all IHC parts, your barrel does match the data for a barrel produced at this time and LMC was known for the best barrels being made at that time in the early/mid 50's, LMC barrels were so well made that were better than any other manufacturer at the time. Looking at your receiver information, it looks that you actually have one of the "postage stamp" receivers made by IHC and not the common Springfield Armory. With the stamping on your stock and dates on your barrel, it looks that the rifle was accepted by the government in late 1953, going by the barrel date and the government acceptance mark. If you have not fired the rifle yet I suggest taking it to a competent gunsmith who can examine the rifle to give you the best advice on how to proceed. The barrel is about to see its 70th birthday next year and there is a lot that can happen to the overall rifle itself, like one big thing you need to check is if the head space is correct on you Garand. Try taking a look at this website, it is actually a .pdf, but it is ok as a friend sent the link to me a few years ago and I have it saved,
https://www.ialegion.org/wp-content/uploads/2018/09/M1_Garand_Manual.pdf , it should help you understand a little better than the old Military Field Guide for information on taking the rifle apart and so on, you should find it helpful for further disassemble. I honestly could not give you a price on the rifle as I just buy them and fix them, I leave the selling to the smart fellows

. You have a very interesting rifle and it looks like it was probably re-imported under the loophole, back in the late 70's, to be made for sale to full time law enforcement officers, I think your rifle came from one of the South American countries, as few IHC rifles actually made it to Korea by the time of the cease-fire. Also just to help you out, when you see in the articles and such that whatever part was made by Springfield Armory, let me dispel some misinformation that quite a few people believe. Springfield Armory as it relates to the M1 we speak of now and the same for the M14 IS the United States Armory that was in Springfield, Mass. and is not associated, nor were John Garand's M1 or M14 MILITARY rifles, with the company Springfield Armory Inc. in Geneseo, Illinois and simply use "Springfield Armory" in marketing. The United States Springfield Armory or Arsenal is a historic site as it closed in I believe 1968 and saw two great rifles before it closed. The name "Springfield Armory" used by a company was first used for a few years in I believe Texas before Springfield Armory Inc grabbed it in the mid 70's, but neither had any relations with the actual Springfield Armory that built some of IHC's receivers. If you read the article in the link above or the link in a previous post for the American Rifle article, it will tell you who made your stock, it wasn't IHC as you said there was nothing stamped on the stock. If you need anything else, feel free to ask. I hope I could help you some.