I was installing my new BBK long tube headers, and I have the headers bolted up and the motor dropped back down, and the mid pipe does not fit the headers???? This is the correct part too, its supposed to fit the headers.
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88 Gt hatch, 96 5.0 motor, GT40 Cast Heads, Explorer upper and lower intake manifold, Lunati 51014 Cam, 3.55 gears, B&M ripper, rebuilt world class t-5, RAM HD clutch, Crane Valve Springs and retainers, FMS 1.6 ratio roller rockers, Eibach lowering springs, BBK 70mm TB and EGR spacer, C&L 73mm maf, BBK long tube headers, BBK short O/R H-pipe.....more to come.
Had the same problem, had to use quite a bit of force (Read, foot on pipe), but was able to get it to fit. After it was tightened up the first time, every reinstall has required no force.
BBK short mid pipe #1510 does not fit! 
