Well the head casting numbers are
91-95 is 7120
96-99 is 0630
00-06 is 0331
If you look around you can find a chart with block casting codes too. Im going to say the engine you are trying to ID must not be in the vehicle? Because if it is the manifolds and controls look way different. If its in the jeep post a picture and we can help.
you said "94 HO" and are asking if its a HO...? ummmm::eyes:
Although i guess it could have a swapped motor, easiest way to tell for me is to look at the vacumme hoses and throttle body. If the throttle body has 3 bolts connecting it to the mani then its a non HO, 4=HO...
Even then i guess some twak job could have mixed and matched things like me so the most accurate would be to check castings using what Norcalchris posted. But those are all HO castings. The renix/non NO casting is 2686 :lecture: