It depends on the frame- I run 700 C rims on a cruiser frame origininally buit for 26 inch wheels-
I have bult three such builds- It's generally what I'd call and most people call a "medium reach" that will fit, and usually if both wheels are 700, it fits for the front wheel- the rear triangles in cruiser frames can very but I've had to use a longer reach caliper on the back on every build- so you have to mix and match really. It can be frustrating but not that bad. Some cruiser frames also have drilled the hole through the cross member at a very odd angle which may affect it.
The best you can do is try to get an acrcurate measurement for both, and hope- if you're looking on the net- that you can get an adequate description.
http://www.porkchopbmx.com/Brake-Sets-Calipers_c32.htm
Got some brakes at this sight here that work well on my Huffy and Micargi frames - front wheels, and I use a shock fork. I think the are Dia Compe model 730- they look short here because the others are more for 26"wheels. An older 70 ish road or touring frame brake is usually about the right reach for the front. The883 models look like they have about the right reach on the rear for a cruiser frame with 700c wheels to me, and I have some experience with it.
The dual lever is a great idea and used one for years w/o fail here. Makes control much more sure.