Tough one; let's see if we can figure this out. 350 on the fender. 350 on the intake. I'd have to take a wild guess and say it's a 350 !!! J/K, the Buick 350 was used in the wags and trucks for a few years. Strong motor, but won't be a direct swap into your CJ.
73 Jeep J4000 360 .040 over, Summit K8600 Cam, Edelbrock Manifold and 750CFM 4V TH400/1339 QT
78 Cherokee Chief- Hunting Property Rig
05 Grand Cherokee- 3.7 V6 5 speed auto