You need to remove 9.25 inches. Check this link, http://67-72chevytrucks.com/vboard/showthread.php?t=323615 Frank
Gerald, If you are going with a disk brake kit you will need to replumb as well. If I remember correctly the original master had two lines one...
The factory six cylinder trucks had the support further forward, longer engine. The support's are the same lower brackets will need to be moved...
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