Here's a dyno of a 473hp @ 7900 EQ headed 273 , funny how all the people in the so called know kept saying can't be done etc... I get the argument there's betterways etc.. But can't, and even if they agree it can it's got to be some ultra trick 15:1 tunnel ram high dollar nascar level deal.
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Or a 477 hp @ 6500 EQ headed 318
Iron-Headed Mopar 318 Magnum Engine- Popular Hot Rodding Magazine
Would it be wiser to build a 360/408 over these probably but to me a 340/361/383/400/413/426/440 stock stroke or stroker would be better performance wise over 360, starting anything less than a 400/440 block is a compromised build leaving power on the table given up street ability I find it funny that the engine with the 3rd smallest bore that from 3.625-4.34" that 4" is where it's at and the line can't be crossed to 3.91" not even with a 30-60 overbore 3.94-3.97" even bored to the magic 4" isn't acceptable cause it's a 318.
When it comes to making power 325 plus hp I can see questioning the 273 bore and see the rational to start with a 360 at least but the whole 318 block can't be built to a similar level as a 360 block I got to question your reasoning and abilities makes little sense.
