Identifying a D16?

I currently am trying to identify which type of D16 motor a friend of mine bought. I have narrowed it down to these three.

D16 y5
D16 y8
D16 z6

These are the only SOHC VTEC D16 series engines listed on any of the engine lists that I have seen. So how can I identify which one it is? If it helps it had what appear to be small dish pistons (or maybe flat tops not really sure as I don't have it in front of me) and a red VTEC valve cover. Any help would be greatly appreciated as I have no clue which version this engine is. As a side note does anyone know what the thing is worth with a transmission (manual I think) and wiring harness. The motor is complete less one piston which has vanished somewhere into the abyss that is my Dad's machine shop.

it should say on the block

did you figure it out?? What did it end up being??

yeah just look around the engine for bar codes and numbers. you should come accrost one of your choices

"accrost" we does nead spiel chekc.....lol

Sorry about the slow reply I got distracted. I have yet to find the number on the block. Where the hell is it? I have looked everywhere, Can someone tell whereabouts on the block it is located?

To the left of the exhaust manifold.. right below the radiator hose on the block.. u might have to clean off the area to see it..

i think you are making it harder than it really is.

I finally found the damn number it is a D16Y8 the chart says it came out of a 96-00 Civic EX. Thanks for the help in locating the number.