1968-69 327's were large journal cranks the small journal was 62-67.A long time ago I saw the Bill "Grumpy" Jenkins book in the late 70's and thought building a 331 would be a cool build,I used a 350 4 bolt block and a '69 large jounal crank and the TRW domed pistons for a 327 365HP Vette.It looked like the engine on the cover when I finished it,Damn BAD motor and wicked fast!