I used the US car tool mini tub kit and it worked out well. I bought the TTI 3 inch headers that were supposed to be a bolt on fit, but they weren't so I had to send them back. The right header interfered with the starter boss on the right side of the transmission housing. The suggested fit of cutting the transmission housing to provide clearance was unacceptable to me. TTI modified the right header so it cleared the housing. After I installed the Magnum Force front end an set up the steering, there steering shaft would clear the tubing of the left header. My fab guy who builds show headers, modified the left side and then I had the headers recoated. If I were doing it again, I'd have my fab guy make me a set of headers they'd be better and cheaper.
