Running rough when warm

I have a '68 dart w/a '78 360 I recently put back on the road. It seems to run good until it warms up then it sputters and pops and runs like crap. Once it cools off it seems to be running good again. But once it warms up its back to backfire city. My question is I'm wanting to know whether its starving for fuel, or it's not getting spark, or what the hell is going on . I'm running an edelbrock 600 w/electric choke but I don't have the choke wired up. Could this be my problem? Any help would really be appreciated. Thanks everybody for all the help in the past