I have the Califronia Bill Fisher book, he talked about building a short stroke 270 out of a 248 block with a 228 crank and apropriately oversized, aftermarket pistons, IIRC.
The 228 crank is supposed to be lighter, the 248 block is supposed to be capable of a larger maximum bore (bigger total overbore).
That combination should rev quicker, and survive longer at sustained elevated RPM.
If you want that.
I was looking at building a warmed up 228 for a '50 GMC truck as just a street driver, and some people I got to "talk" to via this forum and others relayed the 228 with a modern build (good compression, mild cam, good intake, decent exhaust and reasonable gearing) should return ~ 25 MPG on the highway, where as the 270s and 302s they had tried returned less than 10 MPG, but I suspect that had something to do with how they were driving them.
