Well; that's the big ($) problem with these engines today. You must buy custom made ones (pistons) @ $100+/- each. When you do however, you get the CID and the compression you want.
I could build you an engine here (California USA) but the cost is really high, just for the parts/machine work required. Then there's the shiping cost & my profit.
The 261 Chevy is best, as it "bolts in" the early Chevy cars. They go to 278" as mentioned or 292 CID with the 'stroker' crank. There in the $4000+/- USD price range depending on what you want etc.
I was doing well at this till the gas increase to $3.25....... The whole econmy has stopped (old car business) since.
I don't know where it is all going, as there is no need for fuel to cost this much, but that's another movie.
