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I would consider a 413 (cheap to build in the long run, more torque where you need it low
midrange)

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How is a 413 cheap to build in the long run if the only way to get half decent piston is to go custom? Other than that every other aspect of the rebuild would cost the same as on a 440.

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I agree with some of of your thread, but a 600
anything I'd run a STEEL CRANK. As far as the
small bore/small valves they are on the right path to produce TORQUE. Plus the flame travel
across the piston is less meaning less chance
of DETONATION. More torque in some way offsets
horsepower at the lower and midrange of the rpm
scale.

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I challenge you to build a 413 that would beat an identically built 440 can on the strip or on the street. All this tech jargon is good stuff, in theory, but the real world has proven all that to not really make enough difference to affect your timeslip at the track. Detonation control isn't a big issue on a 440 if you know how to setup your engine and I don't think that 413 is going to make more torq in the bottom end, at least nothing that would show up on the butt dyno or the drag strip. The fact is the 413 isn't a bad engine, there's just no reason to run it over a 440. There are a couple 413 devotees on here who just don't want to hear the truth.

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