400 big block + my 71 Demon

tti, something with bigger tubes. on my dart i am running the 2" tti but they were for an RB i had to move a couple tubes around to get them to work with the B block. things get funny with the typ of head you use. some heads have a raised exhaust port which will effect how the headers fit. i forget the details. there are quite a few aluminum heads out there now. tti also has a few different headers available since i was in the market.