NY-wise, WNBC also put Sparks Crosswits in the wee hours. Didn't know about J! starting there, when did it move to WABC?
And when did NTT (Lange version, I assume) air late night on WABC? Cause I know it wound up in daytime, as did J! (perhaps the same block? I recall a promo for the two shows...which was seen during a 7 Late Movie, oddly enough. So was J! ever on WABC's late night too???)