Pappy I assume by cruiser pegs, you mean highway pegs?
If so, what you want is is a set of 4050s with offsets clamped to the lower engine guard (underneath), then swung back as far as necessary to give her a comfortable reach. Besides swinging them back on the offsets, you can bring the clamp itself back on the engine guard (but at some point, if you come too far back/down with the clamp, the arms/pegs may contact the valve covers). Besides angling the offset arms to the right position, you also adjust the angle of the dually pegs to the right angle. When not in use, they fold up tight to the bike, and will not hit in a drop or tip over.
Remember, not a 1 1/4" Harley clamp, a 1
1/8" Valk clamp.
I set mine up, so I am comfortable with bent (not locked out) knees with feet on pegs, and then if I want to really stretch out, I can put my boots over them and stretch out straight legged.

You can see what I mean about mounting the clamp too far back/down and contacting the valve covers. Mine are very close, but never touch.

These are the best and strongest clamps available, and can be stood on without moving them.
http://www.amazon.com/Kuryakyn-4050-Cruise-Dually-ISO-Pegs/dp/B000GZQIN2/ref=cm_cr_pr_product_top/186-1171061-4521762I have seen them mounted really low with the offsets near horizontal, and you have to be careful as in that position the hwy pegs will touch down BEFORE the drivers pegs (and when riding twisties they should be folded up and not used). In any event, do not mount them that low, they could conceivably go in a pothole leading to traumatic consequences.