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HP 689S Manifold Set Compatible with old standard log style 383 with Flat Flange?

F8 F8 69

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New to forum. Can you replace 383 log style exhaust manifolds with HP style? It appears that the two end at the same spot relative to the rest of existing exhaust system and both have flat flanges? Has anyone used the HP 689S Manifold Set in this type of 69 383 application?
 
Yes you can swap a log for an HP manifold, BUT the head pipe flange has a wider bolt spread and probably doesn't line up to the existing head pipe.
 
New to forum. Can you replace 383 log style exhaust manifolds with HP style? It appears that the two end at the same spot relative to the rest of existing exhaust system and both have flat flanges? Has anyone used the HP 689S Manifold Set in this type of 69 383 application?
While you're here, stop in and say hi to the folks in the Welcome Wagon section. Post a new thread over there. Introduce yourself and/or your ride. You'll be happy you did.
 
Does anyone know the diameter of outlet and measurement of the bolt spread at the flange?
 
Another exhaust question...did 69 road runners come standard with the log style manifolds?
 
All 69 runners should have the HP style manifolds on them from factory.
 
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