Here is one not too promising post: http://www.opelgt.com/forums/showpos...96&postcount=5
But:
Rule 39
39. OEM intake manifolds, must have manufacturer’s identification marks. Any OEM intake for make of car.
39.a. Maximum (2) inch thick carburetor adapter plate allowed. Must be bolted or welded to the factory intake location of manifolds only.
I would say forget the porting term and argue that you have an OEM intake that was modified. 39.a. states you can weld an adapter plate to it. So OEM intakes can be modified by welding the adapter plate.
You followed 39.a by not moving the carb location. The rule does not state modifications cannot be made to the intake.
Weak rebuttal? maybe, but it's a start.


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