Quote: I have a truck/towing build in the truck section I have been working on. It is on my dyno now,a 440 with factory closed chambered heads. When I recieved it,it had KB quench style pistons but was set up with too much quench clearence. I took the .053 head gaskets out and went to a .020 steel shim gasket to tighten up the quench,that gained me just over a half point of compression. With the quench fixed and the small bump in compression,it gained roughly 30 hp. The best part was that it really helped the power hang on for a lot longer than before. Keith
