It's possible to do it, but i haven't done that type of swap. I'm currently putting a 455 Buick in a 46 GMC, but it's on an S-10 frame.
I know what you mean about the torque, with a cam, intake, and timing chain and gears my 455 should be around the 500 ft-lbs mark, and in the mid-high 300's for horsepower. It's hard not to do it with those kinds of numbers. The big luxury car motors are glossed over by a lot of people that don't realize most were superior to the chevy motor technology in the day.
