Only time a hose is an issue is if you get a radiator with a Corvette lower outlet on the tank as it is at a ninety degree angle instead of straight. A lot of aftermarket "universal" radiators come with this feature for some reason.
Problem with a BBC shroud is the off set. It won't sit along the center line of the car creating clearance issues with the fan. Firebird with a 400 in it was centered (because only the Chevy has a BIG
block engine, the other GM "big blocks" are the same size as the small block). Because the BBC was built to be a truck engine it is huge compared to the Chevy small block, and doesn't fit in a first gen Camaro or a Nova body without being offset. It is this off set that causes all of the problems. I don't know if a first gen Firebird radiator shroud uses the same mounting method as is used on a first gen Camaro. But it is designed to fit centered in the body and cover the larger 23 inch radiator core.
Unless you are building your BBC car the way the factory did it; using reproduction parts with the correct factory dimensions (most, but not all reproduction frame stands are deficient in meeting the proper dimensions) then there will be some fabricating or modifying to get other aftermarket parts to fit without interference.
Back when I was still running Camaros Hooker made all of their headers by hand and had a different part number for every combination you could think of. Those headers fitted without crimping the tubes (though you might have to cut a hole in an inner fender to run the tubes outside of the frame). Today the number of different headers offered is reduced to a fraction of their previous quantity; as they now build headers with robots to fit as many car bodies as they can; with as few products as they can get away with. The big title splash says it fits a BBC in a Camaro, but the foot notes tell you, if you read them, that the pair you bought probably won't fit your car as optioned.
Rather than going wider to obtain more cooling capacity consider going thicker. There are used radiators out of NASCAR race cars for sale that will cool over a thousand horsepower and are the same size only thicker than the radiator that shipped with a six or base V8.
NICE USED C&R NASCAR RADIATORS W/ OIL COOLERS ? Mooresville ? NC ? USA ? General » 2nd Chance Race Parts