The vendors all have offerings that address both the collector and different head ports locations. If you want to cut up Hall big bores that's okay too, make the cuts so they fit neatly in the trash bin.
Wilkinson produced less restrictive GTS headers in mild and stainless and they are well regarded from a HP perspective on dyno results and look oem.
Trickflow heads have "Exhaust port raised 0.1" over stock 2V head"
Julian
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