The body is a 20 gage galvanized 3A shaped body.

https://anchorage.craigslist.org/cto/6104651920.html

“1956 CJ-3B chassis with new 20GA galvanized CJ-3A body. New springs, frame brackets, body brackets, Overhauled1968 Chevy 283 cu. in. V8, 2 bbl Rochester Carb w/manual choke. 1958 Chevy BelAire tail lights, LED headlights, NOS TransDapt adapter, new transmission gears, new transfer case gears, new overdrive.

New 31X15.50X15 Goodyear Xtra-Trac Terra Tires on new 14″ X 15″ wheels, new Bestop convertible top, new wiring harness, high output cab heater, new Chevy steering w/Advance Adapters mount. 10 1/2″ clutch w/Advance Adapters chain drive clutch system. All new everything except frame, front and rear axles; 5.38:1 gear ratios. New Warn locking hubs. New front bumper, new rear cross member, boxed and reinforced frame over rear axle. NEW Dual brake system, 11″ Jeep truck auto adjusting brakes, all new bearings in axles, wheels and king pin bearings.

Custom front bench seat, original draw-bar system with new trailer mount and ball. Original, grease-able Pintle hook rebuilt. PLUS enough new gears to refill transmission, transfer case, new front and rear ring and pinion to change to 4.10:1 ratio. Reconditioned PowrLok differential for the rear axle with all new bearings for front and rear differential change. HD steering stabilizer, one-piece steering tie rod system. New, in-the-boxes full floating rear axle kit with drive flanges and axles; never installed.

Dual exhaust, New HEI distributor available but not installed; used original GM distributor and ACCEL parts. This is a complete frame off rebuild/restoration. Also extra convertible top new in the box; never installed. Total of 297.4 miles since rebuild.
Serious inquiry only. “