According to Engines Australia, the combustion bowl volumes are the same. See attached.
I have a buddy (
@Socal81) running late model pistons with early injectors and pump. His truck is running great.
I've also spoken to Noordeman at length and they insist there is essentially no real difference running a mix of the late pistons with early injectors / pump. You'll just have to use the appropriate washers with the injectors.
I've personally opted to go with late pistons and early injectors / pump. I expect my truck to be done early next year and will follow up once its broken in.
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