I am running the MAC shorty 1 5/8". Yes I am talking about the header to H-pipe flange. what it is, is the bolts come up through the bottom of the H-pipe flange into the header flange. The bolt has a perm. nut attached to it. I even tried using a new bolt, of the same size, and it would only go in about 1/4" also. Thats what led me to believe the threads were stripped/cross-threaded.
Chris
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1987 LX, Best times:
13.47 @ 102.49, 1.80 60ft 6900' DA
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