Like everyone else, Here's my plan on a rebuilt for A100 van.

Strong stock rebuild with a 225, .30 over if needed.
Standard/stock Bottom end with Doc's oiling mods and whatever other neat tricks he printed that I can't think of off hand.
Erson's RV-15 cam, Stock rockers and such.
Full Ported head with the BIG valves on both side, hardened seats too.
Head milled .50-.70 Haven't decided yet how much. Looking for a 9.?-1 comp
Blocked milled maybe 10-20 for clean up and lower deck height.
S.S. with a Weber DGV, 727 stock tranny
3:55 rear.
Stock gasket matched exhaust manifold w/2-1/4" tubes and turbo muffler.
I just want a stronger than stock build outta this. If I can get 175 horses with this I will be happy. The thing is what is a good Piston that will put me in this window that will give good grunt for a van? I pretty much have everything else for this build but need this info. Any ideas? Thanks