Help With Carburetor selection, Please.

I have a 1960 plymouth valiant with a stock 170 slant 6 in it. I am going to *possibly* soon put a 225 slant 6 in it that i have in my garage. I would like to put a [FONT=Arial, Helvetica][SIZE=-1]Edelbrock 500 CFM 4 brl carb. Do you think that it would be to much for the 225 engine? If yes, then would it be better to do a 2 barrel carb? (I have a non stock intake manifold that works with the edelbrok, im just hesitant, because I'm not exactly sure if it will be to much for the 225 or 170)
Thanks,
Corey
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