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SBO heads 7a vs. #3

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Old November 26th, 2011, 07:16 AM
  #1  
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SBO heads 7a vs. #3
So how much difference is between the 2. Camber size valve size ect. The motor in my wagon was one of each.
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Old November 26th, 2011, 09:30 AM
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#3's are usually 5-6cc smaller on the chamber. I just used a set of 2's on a 76 350 and ended up around 9.2:1 last summer.

I don't remember the valve sizes off hand.
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Old November 26th, 2011, 10:23 AM
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Richard, before you put it back together if you want to have a matched set I've got singles of both castings. Since money is tight for you, have you got any trade stock?
John
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Old November 26th, 2011, 10:32 AM
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I am waiting for mama to get back from Christmas shopping then I am going to try to get the motor out apart this afternoon to see what I am dealing with.
I will let you know.
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Old November 26th, 2011, 12:10 PM
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Each trade one, and you'd both have a matched set!!
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Old November 26th, 2011, 12:21 PM
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Originally Posted by Rickman48
Each trade one, and you'd both have a matched set!!
Too bad we wern't closer, like in the same state!
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