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I know some shops love the roundy - rounders, but their guys have the higher end stuff and keep a spare in the trailer. Some shops avoid it, saying there's no money in the "claimer" motors and when average racer blows his junk up he needs it for the next weekend which disrupts the shops regular work.

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I agree,but I also see crate engines as a big stab in the back for engine builders.
I built a few roundy round small blocks over the years and they did well. The main difference between building those and drag race engines is in the drivability. Getting too much power can loose races just as easy as not enough. Wearing out a driver with too much on and off the throttle looses races.
Nice smooth torque curves and part throttle drivability for when the caution flag is out is a big deal there.
Keith

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Kieth, Here's how my builder looks at crate motor's,,someone has to freshen them sooner or later, and he has seen his share of crate motors come in with their share of problem's,he once had a Mopar 410 crate motor come in after having running it for the better part of a season and the owner was quite dissatified with it's performance, brought it in to Terry and some of the thing's he found were just rediculous, and this motor was build by a known builder for Mopar,,long story short,,customer went out and won the next 3 races in a previously un competetive car,, same or worse with the chevy crates.