Bought TTI 3 weeks ago. 408 6 Pack for a 1972 Dart.
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Those are the TTI shorty headers. I tried them on my Duster with my 340 and 4 speed, I went back to my Doug's. The clearance on the Z-bar, disk brake prop valve, and frame is
really tight. I also had to cut an even bigger chunk off the bell and inspection cover at the corner on the passenger side, and the shortest oil filter they make still practically touched them with my Canton oil plate. You'd either need a stock oil sandwich plate or the 90* adaptor.
The Doug's on my 340 fit pretty darn well. I do have manual steering, although I also use a Borgeson dampening steering coupler that's just as large as the stock power steering coupler. Might be in a slightly different spot. The Flaming river manual box I have is also a little bigger than a stock manual box. You do need the modified Z-bar, I modified a stock one according to the specs on TTI's website for their headers. I did need a few dimples in the headers at the torsion bars, but that's mostly because i have 1.12" diameter torsion bars. I also have the spool mount K-frame, so, I can't make any adjustments with shims either like you can with the earlier biscuit mount K. Whether or not the TTI's or Doug's fit better is pretty much a toss up that ends up being dependent on the assembly tolerances on these cars. In other words, TTI's fit some cars better than Doug's, and Doug's fit some cars better than TTI's, and you won't know which until you try installing them. The one thing I wouldn't do is run headers that have the steering link go through them, not enough ground clearance on any of my cars for that.
My steering coupler, it's not small and it clears fine...
TTI instructions. You can buy a modified Z-bar from them as well
Mine
I saw a set of TTIs not to long ago at a car show on similar A Body .. Looked like a nice piece. It was no picnic getting them in, but well worth it.
