360 heads on 318?

i have a set of regular 360 heads and a set of 915 j heads i want to add more power to my 318, will putting the regualr 360 heads on add more power since they do ahve the bigger valves or am i just going to waste my time putting them on and if i do put them on should i get them shaved at all.
my 318 is .030 over and i have the 1970 340 4 barrel cast iron intake
any input would be great thanks guys
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