The 383/400 Chr has the highest rod/stroke ratio of ALL the popular BB engines. That means they do not breath well at low/mid rpm, all else being equal. Sig Erson, a very clever cam grinder, realised this DECADES ago & issued the warning below; although it refers to the 440 [ has a high r/s ratio as well ], it also applies to the 383.
No other engine brand has this warning.
The popular stroker combos [ 383/406 SB Chev, 4XX SB Chrys, 347 Ford ] all punch above their weight compared to stoke configured engines. What these strokers have in common is a low r/s ratio...
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