Ok, thanks, I addressed all of those issues, I was just thinking the way you stated it that missed some engineering need to manufacture something different internal to the block.
Some simple common sense issues with a 347 in a Bronco:
First, the guys with big thick glasses in Detroit did a pretty good job engineering the cooling system for a 302/5.0.
Now, us armchair engineers go and punch that to 347 and now you need to cool and extra 45 cubic inches, or 13%. Or is it? It's only hotter if you use it at peak RPM. So we in Bronco land will only be using this in the 3-4000 rpm band at most. Well below the peak rpm desinged by Ford (5800 rpm). Resulting in RPM wise, only needing to cool a motor which is running 30% less than a stock 302. Yes, there's more to it (throttle angle, airflow).
Next, you mentioned some common cooling issues with the 302, head gaskets wrongly installed, backwards running water pumps, bad thermostats, air bubbles (one of the biggest and even mine on the test stand needed to be burped twice), and most critical a proper fan/shroud/radiator. Biggest mistake folks make when having cooling issues is failing to realize their system is just old, dirty, worn ot. Gummed up radiator, overbored and tired motor, missing proper fan or shroud, and radiator deflector piece over core support.
A stock radiator will work, but... The size will work, but triple pass is probably needed to ensure cooling on the hiway under load and sitting at a light at the corner of McDowell and Scottsdale August 3rd.
I plan to use BC triple pass and have AC to boot, I did however give up on an automatic as being unable to think of a reasonable way to keep that cool as well as the motor. Besides, I think the NV4500 sitting on my garage floor looks cool.
