Thanks for you help guys.....
Are custom forged pistons my only option ???? Do Wiseco have Australian reps ????
I was hoping to find pistons from another engine to suit. If necessary just machining the tops to get the
right compression ratio.

I dont think there your only option at all. Im sure you could get some nice flat tops to suit your engine. Depends on how much you are willing to spend and how
much HP u want....

Im not sure wot other pistons from other engines could fit tho. Im sure theres somthing out there that would fit. Just a matter of finding em.

Scott
Davo

Try looking for some oversize pistons made for the Mazda 323/ Ford Laser engine. They are close to the size you want and are a very similar design to the Datto ones. The wrist pin
is sleightly larger so you can open up your standard rods and there is plenty of meat in the crown of the piston for machining to suit the deck height and getting a good compression
ratio. Better still they are cheap. Try an engine rebuilder for a catalogue to hunt through.