help with radiator replacement

If I was you and knowing what I know NOW (I would go with a COLD CASE) and a factory AC shroud//./you have to use a fabricated shroud with a champion radiator... pre 70's 340

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Stock shroud won’t fit a champion radiator. So you have to make something. Stock shroud has gaps too.
X2 I just tried it tonight, pulled the radiator, stock shroud is a no go.
The inlet and outlet necks must be closer together, or the radiator is shorter, because the stock shroud will not even sit between the necks.