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400 vs 383 intake

Started by GoMangoBoys, May 14, 2020, 07:49:45 PM

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GoMangoBoys

Would an intake from a 400 have better flow than one from a 383, or are they likely the same part?

Chryco Psycho

very similar I assume you are talking about stock intakes , most 383 intakes had the square bore bolt pattern which works well with Holley carbs which most prefer , the 400 used the ThermoQuad spread bore bolt pattern which is less desirable as far as using aftermarket carbs

RUNCHARGER

I read somewhere that the spreadbore intake flowed a bit better but who knows.
Sheldon


Chryco Psycho

I port them anyway , I can leave Nothing alone  :D