P7 with an EEI block. The heads are still around. Many have upped their price considerably. I see ads for one set of heads that are four times higher than what I got.

The block and crank isn't cheap. Ritter has tons of R5P7 stuff. But, again the block aint cheap.

P5's with a billet block to handle all the stroke you want. That would be the ultimate strategy.

Leon