grouted 440 block

Got a grouted 440 block. I grouted it out of ignorance of not knowing about the thin wall casting block. Its a 30 over block . building a 512 cubic inch. 270 trick flows. Putting it in a 72 dart swinger with a narrowed dana 60. Question would be !!! I will be driving this on the street and strip. I'm thinking I may have a cooling issue down here in East Texas. It gets really hot and humid here. Anyone one tried this. I have another complete 440 and trans. But would like to save it for a spare if I could !!