So I just pulled the bottom end apart on my 327 and I have no idea what kind of pistons were in the thing. They're casted with an "S" inside a shield on the side and have the casting # 310P vertically in an oval on the same side. They're .020 pistons and I believe 10.1:1. Anybody have any idea?

 

From: http://www.amotion.com/csb.html


327 Head cc for compression: 68cc
327 Stock Truck, Hypereutectic Sterling H951P*8
327 Stock Dish 8.7:1 Sterling 310P*8
327 Stock Dish 8.7:1 Keith Black KB158*8
327 Stock Dish 8.7:1 TRW Forged L2165F*

 

Ooooh, 8.7:1. Yeah, looks like I'll be replacing those then.