willysmjeeps.com

Mounted on an M38 purchased from a base in San Antonio in early 60s. Is this a 539 or a 636sa? Could it be original (were any M38s produced with these)?

Thanks for any help

Opps, how do I upload pictures?

YS637S is the only factory original M38 carb. 539 & 636 are WO carbs for MB's and CJ's.