I guess I wouldn't think 75hp would be that big of a deal...
No need to swap engines, my Ranger on occasion is slightly heavier and slightly less aerodynamic (maybe) than the Bronco with the slide in camper in it... it does fine.
your ranger is perfect for the time period technology. it is why it is my favorite truck on this sight....what you built is literally perfect in my eyes.
i always had at least 6 inches of lift and 33s generally 260-280 wheel which exceeds 300 crank.....with that base load and dirty air was always at the max in fuel psi and detonation but worked awesome for the time. and I estimate is close to the same base load as the bronco.
the bronco I would guess is closer to 1k heavier than your ranger...700 with the normal topper you run ect at least. that and 70 hp...is quite a bit....
where it changes, is that spooling ridiculous torque it has on tap and near infinite gearing....that is galactic in difference.
this all things being equal....
straight swap your power train into the bronco which is a cow....
and comically un-aerodynamic..
directly compared to your nimble ranger and you would definitely get what I am saying. 75 hp not sounding like alot is hard for me to fathom....but you are used to it.
would be sounding awesome but in comparables would be misery. the 10 to 12 mpg at a mere 70 mph the final kick in the berries. go the other way and I think it would be crazier.
maybe not.
its the only way to appreciate just exactly what we have with this modern platform.
i have had a myriad of power trains in a single platform and cost per mile is always a thing for me.
if it wasn't....i sure as hell wouldn't have that slug in my rig. but it is extraordinary in cost effective operation. and it is 6k with me in it empty.
something a 2.3 eb or 302 can never do.
but at least those can do cool burnouts and haul ass.