383 vs 400

my 2 cents.... You can't beat the 400 when doing a complete rebuild. Yes the factory 400 sucked. It was laden with bad electronics and poor fuel management. But to start with a clean block from scratch? 400. It can take more stroke and more bore. It has stronger main webbing, period! I have an early block cast in 71. Holy moly, the upper main webbing is solid up to the cam journals!!!