Well another day and some more progress. I welded things back together. I thought about just tack welding at first and then a trial fit but got lazy or in a hurry, I'll let you decide

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After cleaning up the welds I went back under and much to my pleasure this time it fit like a bug in a rug.
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There is about 1" clearance between the top of the crossover pipe and the pan. There is also about 1" clearance between the back of the crossover pipe and the pan.
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There is enough room to put a thermal barrier over the pipe to keep most of the heat off the pan. I'm a little more concerned with the 1" or so of clearance with the front drive shaft. I'm going to play it by ear for now but one of my thoughts is to space down the axle bump stop to prevent any impact between the drive shaft and exhaust.
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I know it may not look it but there is actually 1/4" clearance with the oil filter. I already run an oil cooler but may also put a thermal barrier around the pipes and 2 into 1 collector.
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As you can see it tucks up nicely above the bottom of the frame rail and there was just enough room to thread the wide band O2 sensor in.
I am going to paint the whole assembly with the same paint I used on the exhaust manifolds. So other than the paint my downpipes are complete for now. The next step will be plumbing the 3-1/2" exhaust back and out behind the drivers side rear wheel.
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