Relatively speaking that is accurate, it is a "big bore", short stroke when compared to a more typical 351W bored .060 (thats about maxed out) and stroked to 4.125 (again that's maxed out), you end up with 427 cid.
The bore centers the block is cast with eventually determine just how big the bore can be. Like I said, .060 is about max for a 351W.. THIS block is .125 over bore, wow, those cylinder walls have to be paper thin, possibly the lower water jackets are grout filled as well. I wonder whats in the fine print about overheating issues with this setup? The 4" stroke is the stock stroke for a 400M (351W based block with a factory longer stroke yeilding 400 cid, called the 400M for modified). So Ford is using a "standard" crank that's been around for decades (holds cost down) and somehow got the bore up to 4.125. Impressive bore size, I really gotta wonder whats in the fine print with this motor?
Myself, I was never was a big fan of a Windsor going this far out, it just seems to "stressed" for my taste. I'd pefer just a bit less, 402-408 maybe, but that's just me, maybe I'm being paranoid...
Hydraulic roller is a good call for this motor, delivers better horse power at a lower rpm. With that large a stroke keeping the rpm down to a lower level is critical to it's survival.
Might be a "siamese" bore? Where the bores actually touch each other, no water jacket at all between them. Like GM has done with the small blocks. You might be able to do that with cylinder liners, bore the heck out of it, right into the water jackets and then insert liners (sleeves)?
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