250 and parts
I should have said ps pump
As stated four bolt water pump is a sure id of a 250 although hard to see sometimes. Should have a sticker under the hood that lists the cubic inches.
That air cleaner will be useful as it is the drop base design for clearance.
With the ignition get the module and distributor and horseshoe clip from coil and cut the wiring back as much as you can.
Also you may want to take a close look at the gas pedal and cable setup, might work for your Bronco as the cable end at the carb will be different than what you have most likely.
Good luck