5.2 or 5.9 ???

I've heard the 15hp gain claim on 318(5.2) and 340 engines.

Pretty sure one of my books (Larry Shepard maybe) said the tray was too close to the rotating assembly on 360(5.9) models and ended up increasing windage instead of reducing the effect.

When I have my 360 apart I plan on calculating the difference between the crank strokes and adding spacers if the oil pan allows.