My 1979 Cordoba kills on me at stop signs doesn't want to start up right away and idles rough how would you go about fixing this?

hi; My '79 Cordoba, 360- 2 barrel was doing the same thing and I was informed that the intake manifold was carboned up. A quick fix to this was to purchase a cleaner called "KLEENS" from a Chrysler dealer and follow the directions on the label. This will cause alot of smoke from your exhaust for a few minutes so it is better to do it at night. I solved my problem and I have not had to use it again as of yet. Good luck and happy Cordoba'ing Let me know if it helps or if I can help further