Yeah, they made a 366 tall deck also. Never could find any HP/torque specs on the tall deck engines, but there was no long rod version ever made by GM. BC may be thinking of when you use a tall deck 427 block to build a race or performance 427 cubic inch engine you have to use a .400 longer rod to use the passenger car 427 style pistons or you end up with a piston that weighs 5 lbs because it has a 2.140" compression height.
Here is a stock 427 tall deck truck piston with the 4 rings, it also has a steel ring land insert in it.
