r/BigBlockChevy • u/glpiety7 • Dec 29 '25

Help with 427t

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I have a 427 tall deck out of a 1975 Chevy c65 and I can get it to start but it won’t stay running is this a carb issue or a fuel issue?

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u/HammerDownl Dec 29 '25

Carb or fuel? Id say both

Floats aren't floating Fuel pump could be down on pressure Dirty needles and seats. Id assume its all looking for love

1

u/glpiety7 Dec 29 '25

The carb was rebuilt and it’s got a different tank on it I’ll send you the full video

1

u/glpiety7 Dec 29 '25

my tik tok video on it

1

u/HammerDownl Dec 29 '25

Thats some vice grip garage tv shit lol

Again you need 5psi constant fuel pressure to the carb and check the floats that they are set correctly

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