I'm assuming that your plan is to be able to use standard AK mags?? Might look for Yugo M77 (.308?) mags to be able to maintain proper curve. Not sure if that'll be an issue. I'm not much on all the specs and chamber pressures etc.... I just do everything by feel. If the Romy kit is a firm starting point, it will definitely limit you some. An M76 (8mm) parts kit would probably be a better starting point. It sounds interesting though. Good luck with it.