i agree on the short deck smaller c.i. approach and spinning it 9000-10000, the problem would then become the camshaft & lifter locations in the aftermarket blocks, which all are still inline wedge based, because once you try to apply a head like the Australian Prostock head (example) over a shortdeck Pontiac block the angles get increasingly worse due to the shorter deck height ...
... and the wideport wedge heads won't look good either on the short deck block as the deck height is working against you still, but all this obviously being directed at very high rpm, the valvetrain must be happy to live at 10k ...
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