Aren't all the Goodwin hemi motors made on their own blocks with a different bore spacing than the stock Mopar 426 blocks?
As far as a all out race motor, N/A or power adder, I think you need to have a billet block these days to make them live at the power levels guys are making now
I don't like aluminum blocks for N/A, let alone billet blocks
But sometimes you need to use what works the best if you want to compete heads up against the rest of the racers