The last time I saw info about this was torque plate helped manage the distortion caused by the head bolts, but having the water jackets full of hot water made almost as much of a difference. Appears that there is a lot of distortion once the engine heats up/
On a racing motor, yes. On a low rpm motor with cast pistons and original ring package, probably not. Nice street rod motor, my problem is finding a machine shop I trust, then I would think about if the piston / ring package required the higher precision.
