Neither, The Bronco has a 351W or windsor. (may not have spelled correctly) The 351 clevland is rare and was made more for the canadian made vehicles. Has a bit more power as well. At least that is what was told to me. Never confirmed one way or the other.
The 302 was a common as a 5.0 in most mustangs up tp 1994 early 95. I think, many of the 80 and early 90 broncos had 302 as well. I had a 302 in my 87 LX mustang.
Thanks for comments on allowing the jeep to park in the drive way.
As for performance under the hood of the Bronco. It is a 5.8L/W it has an orbital battery similar to the Optima. K&N flp kit, Hyper programming, breaths out (currently) a flow master muffler. Soon changed to a gibson full cat back. NGK spark plugs, royal purple fluids. Other then that stock. Later I plan on cams, pistons, Valves, new fly wheels and balancer. Or I may change out to a new crate engine with more power. Maybe once I reach 150k miles.
As for the Jeep it is the simple Inline V6 4.0 with a K&N filter and royal puple fluids. I have a optima battery just no need to swap it in yet. I am changing the air intake to a snorkle system with a new throttle body, Throttle body spacer and power programmer. New banks cat back exhaust and headers. However power in the jeep is not what I am looking for right now. More protection. Heck maybe I will look into the viper engine swap.