i believe the d16a8 is similar to a DOHC ZC, they raise compression quite a bit, unsure how much though. the stage 1 cam sounds great, just wait a lil longer til the exchange rate comes down.

to be honest, you'd be better off buying the pistons overseas. YCP pistons are very famous amongst most honda builders. Ive heard Topline do a few pistons, but again unsure where to get them & what part #s.

could shave the head a little to help bump compression aswell as fitting a 2-layer OEM headgasket will also help. they would compliment the stage 1 cam quite well i would imagine. the possibilities are endless for the d-series.