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Author Topic: Cadillac 331 exhaust manifolds  (Read 352 times)

Offline Dave A

  • Posts: 14
  • Dave Anderson
Cadillac 331 exhaust manifolds
« on: February 21, 2010, 08:22:53 PM »
Did cadillac use 2 different exhaust port sizes?  I have a 331 engine and 2 sets of heads and both have sets of heads have a different size of exhaust ports and everything else lines up just fine.
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Dave Anderson

Pat

  • Guest
Re: Cadillac 331 exhaust manifolds
« Reply #1 on: February 21, 2010, 09:02:41 PM »
Dave,
Sounds like the other set of heads is off a 365..they had larger ports.
Cheers,Pat
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Joe 12138

  • Guest
Re: Cadillac 331 exhaust manifolds
« Reply #2 on: February 24, 2010, 03:25:21 PM »
The '49 thru '51 heads used smaller exhaust ports, as they used a 2 barrel carb. When the 4  barrel came out with the '52's, the exhaust ports were larger as well.
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Offline Dave A

  • Posts: 14
  • Dave Anderson
Re: Cadillac 331 exhaust manifolds
« Reply #3 on: March 01, 2010, 05:49:13 PM »
Will the two barrel manifold work on the 4 barrow head. I have a set of heads with smaller ports but they will need a lot of work.
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Dave Anderson
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