Wondering if anyone has tried it? Figured I would machine the cloverleaf out to match the adapter. Thoughts are appreciated.

I would run it on the motor first with the stock manifold with a 1.5 inch tall tapered 4500 to 4150 adapter and then look at all the spark plugs, if you see a descrepancies in the plugs then think about machining the intake Bob George racing has a mod they do on the Indy intakes that works well with the proper carbs, IE 4150 intake mods for 4150 carbs and the same on the 4500 carbs. and -3 Indy intakes. Some of the early versus the late -3 intake have differences in them so be careful on what you mod