This early M-38A1 has an updated engine.
https://www.facebook.com/marketplace/item/568096098166715
“Willys Jeep M38A1 1952, transmission 3 speed T-90, transfer case 2 speed Dana 18, front axle Dana 25/27, rear axle Dana 44, 283 V8 Chevy. Also comes with a full tune up kit. Message for contact info and appointment”