The clearances will be close, depending on what else is mounted under there- - - -gas tank, spare tire, etc. Unless you're determined to have the low rider look with the frame almost dragging the ground, hanging the pipes flush with the bottom of the frame rails or slightly below will solve a lot of problems.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!