I'm probably opening a can of worms here and I don't mean too, but I'm slightly confused. My sbc knowledge isn't great and it mostly stems from about thirty years ago when my brother built a 34 Ford p/u with a mouse motor Jag suspension etc, and I owned a '66 vette 327/350hp. Most of my performance cravings have been relieved with motorcycle power since then.

Back then the common belief was the 400 block with it's siamesed cylinder bores could make a good high torque truck engine but would not hold up to high horse, high RPM street/strip use. "Just build a 383" was the often heard advise.

Now that I am looking at street rods again I am seeing ads for crate motors and engine kits with 427ci and larger sbc. Wow!

I've done a search on this forum and for the most part people are still saying "just build a 383" with a few swearing their 600 horse 400ci mills run forever.

I won't doubt any individuals personal experience. There are exceptions to everything I guess and I REALLY DO NOT want to start a war.

I guess what I really want to know is how do they get 427 or more cubes out of a sbc? Stroke a 400? It can't be bored anymore can it? What's the biggest mouse out there? With controversies over 400ci, how in the world will anything bigger survive?

Great forum! Lot's of good people on here!

Thanks for your time.