Hello, I'm Danny.
There were two different V8 options from the factory in your Bronco the 5.0 liter (302ci) and 5.8 liter (351ci). If you want to keep your manual transmission (M5-OD-R2) it will bolt up only to the 5.0 liter. Your automatic transmission options are the AOD, C6, or the E4OD. Those engines are very common and readily available from most engine rebuilders. Let me know if you have any further questions. Hope this helps and thanks for using 2CarPros.
Danny-
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Thursday, January 31st, 2019 AT 10:30 PM