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Old 04-02-2008, 06:09 PM   #1
Dads 68 GMC
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R.H. ram horn question

I am almost ready for exhaust on my 68 gmc 4x4 350 engine. after glass beading & painting my manifolds & installing new studs ,I realized my right ram horn has a flat surface by the studs. this must be for a heat rizer, should I get a heat rizer or try to find a manifold with the step for the donut? I will try to get progress pics up soon. thanks in advance for any help, Philip
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Old 04-02-2008, 06:45 PM   #2
dan42
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Re: R.H. ram horn question

Mine's got a flat spot for the A/C bracket - I don't know about the heat riser.
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Old 04-03-2008, 03:36 AM   #3
JimKshortstep4x4
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Re: R.H. ram horn question

It is pretty easy to grind a 45 degree relief into the manifold. I use a iron exhaust manifold gasket to check the fitup of the gasket. It does not take long to make the relief and once made the manifold seals very well if you do a decent job of grinding.

The manifold does not have a relief because it was made for a heat riser.

Jim
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