Here's what we know of the "Jalopy" in and after the war.
The "Jalopy"was flown back to the USA on May 31st 1945 - arriving in Bradley Army Air Field (Connecticut). It was intended that the 44th Bomb Group was to be retrained to fly the Boeing B-29 and serve in the Pacific. After VJ-Day the "Jalopy" and many other B-17s and B-24s were taken off the USAAF inventory and passed to the Reclamation Finance Corporation (later the War Assets Administration). The "Jalopy" was flown to the recently deactivated Altus Army Air Field (Oklahoma), where it sat with 2600 other warplanes waiting to be turned into aluminium ingots.
Sometime in 1945 or 1946 somebody in Joplin must have become aware that the "Jalopy" was sitting in Altus waiting for the scrapman's torch and the smelter. The Joplin War Dads had the idea to bring the plane back to Joplin to act as a museum / memorial and planned to include it in the proposed Joplin Museum on Schifferdecker Avenue.
The "Jalopy" was flown back to Joplin on Sunday, 11th August 1946. Its return was photographed by Murwin Mosler and some of his photos appeared in the Joplin Globe on August 13th.
Sadly, the money needed to house a bomber with a wingspan of 110 feet and a length of 60 feet was not forthcoming. The bomber sat at the airport and was prey to thieves, souvenir hunters and vandals. The state of the bomber declined rapidly and in February 1947 (I think) a committee met to decide the fate of the "Jalopy". It was unfortunate, but the plane was becoming a danger as well as an embarrassment. The plane was broken up for scrap and hauled off to a smelter in Kansas City. The "Jalopy" had gained an extension of 6 months in its short life.