I am not going to bust anyone out for wanting a Coyote in a Bronco, it is your rig and pocketbook.
And I am sure everyone here has done some kind of up grade... But not really what they wanted, so every time they look at or drive their Bronco they relive the shoulda, woulda, coulda feelings...
So I am just going to say I have a 71 Bronco with a 2000 Explorer motor and a 4R70W, 4:11 gears and 31" tires. EFI guy did the harness. I went through the motor that had a 100K on it. fresh water pump, oil pump, timing gears, gaskets. Main bearings looked great as did the cylinder walls.
I paid $600 for the motor and $250 in parts. The (2wd) Tranny was Craigslist special at $100. I had it rebuilt, with the AA adapter installed for $1800.
For $2750 the things launches out of the hole very well, surprises people. It cruises at 2200 rpm and it gets an honest 18mpg combined.
I did all of the work myself, except the tranny.
So when I see people floating $10K to just start doing a Coyote conversion, I wonder why? But it is your rig and your money, so do what you want... But I am very satisfied with the Explorer conversion.
You are welcome to Flame me, but I am just offering my opinion.
Doug