I run a 427SO bored 22 over with a mild cam and 428 crank. It idles well at 800rpm, runs cool, and has had no issues in 5000 miles.
Oil pressure is consistently 75lbs, above 2000 rpm and never lower than 35-40lbs. at hot idle. It also has a very flat torque curve and pulls like a tractor from 2Krpm.