I think he means Full Size Bronco. IIRC it's because of the bellhousing. The explorer had a RBV-based transmission already attached. Easier to swap. The FSB you'll have to find a different bellhousing for the proper transmission. It's not that fun.
negative, the explorer 5.0 uses the SBF pattern
351w/c, 302, 4.2l v6 essex, 3.8l v6 essex,
btw the explorer has the 4r70w for the 5.0 and 4r55e or 5r55e(i believe) for the 4.0
NOT the 4.0, 2.9 pattern, 2.8 pattern
the intake on the bronco is taller
have to change the oil pan on both to dual sump unless you have a SAS
explorer accessories are the shortest 5.0 accessories available, the bronco is the long accessory set
explorer has a better cam and heads from the factory, HO cam and gt40 heads basically vs Speed density cam and e7 heads.
explorer has better fuel injectors 4 port vs 1 port for better fuel atomization
both blocks and bottem end are basically the same
ive done the 5.0 bronco/f150 swap, its not worth it,
go with a explorer 96-91,
mustang(Any year sn95 is best)/thunderbird
town car
truck as last resort