uh, just a shot in the dark here but why dont you swap to a 7120 Head and use a 97+ up intake and exhaust? the head is a direct swap...many stroker builders use the same setup..except, its usually an aftermarket header instead of the stock one...a good replacement is a mopar stainless header and will bolt right up to a 7120 head...(even has that stupid coolant sensor in the head) ...you do have options, you arent limited to just the renix head but there are some mods and homework that have to be done...Im sure there are alot of people here with answers though.