Yeah, I was blindly following SN7407 datasheet. I don't really care about timing, so I upped it to 1K pull-up.
given that I-inh max for a SN7407 gate is 40uA and a pic output pin could drive more than 20 of them and still produce a clean TTL signal.
i cannot see that signal timing would even be a consideration. just what need does the pullup fulfill ?