Later model pistons in 1075 block?

Gday guys,i have a 900 block with 1075 sleeves fitted.
I have heard you can use the later model GPZ1100 pistons if you run a spacer plate to correct compression height?
Does anyone know what year the wrist pins changed size,and what models pistons could be used as a "cheaper" option for a big bore kit when boring out the 1075 block?:huh:
Thanks in advance,cheers:)

1981 1982 GPZ11 Hundo run 17mm Pins like the '80 and earlier KZ's...

You can go to www.wiseco.com and view the changes etc.

Headly wrote:

Gday guys,i have a 900 block with 1075 sleeves fitted.
I have heard you can use the later model GPZ1100 pistons if you run a spacer plate to correct compression height?
Does anyone know what year the wrist pins changed size,and what models pistons could be used as a "cheaper" option for a big bore kit when boring out the 1075 block?:huh:
Thanks in advance,cheers:)

That's incorrect. The spacer plate is required to correct wrist pin location difference.

Yeah thats what i meant,(sort off) level deck height i spose