Overheating issues with remanufactured 360

Oh boy!!

I don't know what your 283* cam is at .050, but with that short accompanying lift, Ima gonna guess it's right around mid 230s*. That is a dynomite street cam. DYNOMITE! If it gets into the mid 240s, well then, ok that's getting up there for a streeter.
To sub it out is to invite other problems,(Dcr wise) and will absolutely not solve your "overheating" problems, which has still to be proven.
Bite the bullet,back up the bus,put a mechanical fan on it!Then drive the wheels off it like I do mine.
As to electric fans,they work on drag cars. Some people have made them work on the street. Key part is MADE them work.
EDIT
As to carburetion; you can put anything on there you want! It just performs differently with different sized carbs. Think about it. A 750 when operating on the primaries is nothing but a big 2bbl. A 600 has smaller primaries and thus a smaller 2bbl on primaries. A 6-pac still operates on a 2bbl.The small TQ has very small primaries; and thus is akin to a very small 2bbl. All these carbs work on most V8s. At the other end, it is possible to stick something on there that is really too big.
The trick to sizing just one, street carb, is to cover all the bases: idle,part throttle acceleration, and WOT.On the street;too small is mostly better than too big. On my 360, I have run carbs from 500 to 750, and the big TQ. And vac secondaries as well as DPs and air-doors.They all work just fine. My favorite is the 750DP, cuz I can open all barrels,whenever, and get lots of wheelspin. On the highway I like the small TQ, cuz its economy tune-able.But they all work. At the track it's different; you will want the engine to put out max power, throughout its powerband and especially at the top of the track. Here sizing is more critical.