Well, "officially" a 600 is too big for a stock-ish 302. But in the real world they work out well.
Probably hundreds of thousands of those things running around on smaller engines. Now, if Holley or anyone else has a 450-500 cfm carb you can get your hands on, that's much better in theory. But even still it depends on how it's set up.
I ran a Holley 450cfm spread-bore carb on mine and it ran like a scalded dog until about half throttle, where it literally dropped off so badly you'd have thought I'd closed the butterflies instead of opening them.
The 625 Carter AFB street carb I had ran extremely well. Especially at idle and off-idle throttle response.
Tried a 500 Carter AFB "Competition" model and it had even more power than the larger 625, but didn't have that sweet, crisp off-idle response.
I fixed that by swapping the primary throttle blades from the "street" carb to the "competition" carb and got it all back. Had my cake and ate it too, so to speak.
Ran a 600 Holley #1850 (basic, manual choke model) and it actually ran great under most circumstances. Just could not keep it tuned and the gas mileage was hideous.
In all those cases, I may never have gotten each carb to it's best state of tune for a 302, so results could have been different had I learned more and spent more time fiddling with things.
But those were the results.
Long way of saying that, while 600 might be too big by the book, it's very workable on a Bronco if that's what you have.
Paul