fat-360 said

G’day. I’m building a 273 over here with this sort of thing in mind. 360 crank, 253 Holden pistons, 300ci. 400ft/lbs-430 should be doable. Airspeed/compression/V/E and a small cam is how we’re going to do it.Getting the engine stroke/bore “square” is another thing. Very confident in getting 350hp/420ftlbs atm. 273’s are a “torque” engine ( ask Richard Ehrenberg), valves are too shrouded by the bore, gotta make the little thing efficient.

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fat-360 said

I’m not here to argue with you, I’ll just do it. I’m lucky to have a mate who has written tech articles ( not R.E, an Aussie) who says it’s very achievable, not only that, he’s done it with our local 308 holdens.

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