Can You Breed A Kc Long Hair Chihuahua With A Short Haired Chihuahua And Can The Pups Be Kc Reg?

It's preferable to breed for one or the other but the pups would still be able to be registered with AKC as long as the parents are.
www.chihuahuaclubofamerica.com
www.askabreeder.com  
http://drnelsonsveterinaryblog.com/2009/01/01/canine-labor--when-to-call-the-vet.aspx  (67 or 68 for a chi and more likely to need c-section)
www.learntobreed.com  
www.dogbreedinfo.com  
www.marvistavet.com  
www.marvistavet.com  
www.lowchensaustralia.com  
www.bullmastiffsonline.com  
www.wildheirlabradorrescue.org  
www.petfinder.com
www.dogfoodanalysis.com