426 hemi info : new to big blocks

B3RE said
Go to a 4.280" bore, and put in a 4.150" crank for a 474ci, or a 4.250" crank for a 489ci. 600+ HP/TQ will be easy.

This 528 used a [email protected]" hydraulic roller cam, and made 653hp/624tq with only 9.95:1 compression. It doesn't take much with a Hemi.
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you definitely don`t need to go that big to get 600 horses out of a hemi . compression and cam, u can get that out of one much smaller than 572.