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For the swap experts, I am starting a 6.0L 4L80e swap into my 87 Grand Wagoneer. T-case tbd but will most likely be GM. The motor has been rebuilt with mild cam, and head porting. To take advantage of the porting I'd like to identify headers with at least 1 3/4 primaries and prefer long-tube. I'm using Novak motor mounts and have a 4" Skyjacker lift. Has anyone identified a long-tube that will bolt in . . . or something close with only minor modification? Many thanks, Darren