Pistons specs question for 340 build

RustyRatRod said

Another example using Chrysler pistons.

KB167 Flat top with valve reliefs. Has a POSITIVE head volume. ADDS TO the total chamber volume.

KB Automotive Hyper - Chrysler/Dodge 360 / 5.9 - KB107

KB191 Dome with valve reliefs. Has a NEGATIVE head volume. REMOVES from total chamber volume.

KB Automotive Hyper - Chrysler/Dodge 360 / 5.9 - KB191

Click to expand...

The guy shopping for pistons on DSS site says i'm right. I think the problem is semantics, depending on the compression ratio calculator. Wallace wants a negative number for a dome piston, a positive number for a dish or valve reliefs. Any piston that has around five cc's, TO ME, means a flat top with reliefs, whether its listed as (-) or not, so i assumed the -5 and -16 were both minus'ing chamber volume.