Someone has put an M-170 tag onto one of the bodies. The 43/8 means the front ends have 5:38 gears.
“Both have front ends with 43/8 tags.the Orange one is in pieces has front fenders with a little bit of cancer frame is krinkled in the front but the tub, hood and windshield are in real good condition. the ambulance tub is a bit rougher. NO TITLES, WILL NOT PART OUT. Will not respond to put of state numbers.”
https://kpr.craigslist.org/pts/d/willys-jeep-projects-x2/6257106462.html