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I have a set of used Ported 7721's by Kuntz. They we're on a N/A combo previously using 40cc Chambers.

Any issue softening the chambers back into something more Nitrous friendly?
I'd like to run a small dome 400" and stay in the 13:1 static range. Not sure with these heads?
 

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That's a little tough to answer for sure not knowing where valve depth is now ?? You can likely put some quench cut on them and or roll back some of the edges. The shape alone can play a big part in this. Also the combo of a thick head gasket and the right camshaft is key to to what you can get away with.. If you need help with a cam, feel free to call Paul at my shop and he can help you with a grind as well.. Thanks, SJ
 
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