The male does not have to be registered with ACA to register the litter (if the mom is ACA).... Since you said you have the AKC # for the male put that on the litter registration application. I've done this before with my Rocky before I had him dual-registered (now he is both AKC and ACA).
You should not have a problem. 
__________________
Joanne and Mickey, Rocky, Wilma, Pebbles, Winnie, Jasmine, Sammie, Peanut, Emma, Rambo |