idle and constant speed problem getting worse

[Popeye_6]

took it for a drive after putting the battery back in and it does feel better. the rough idle is still there, but its gone from "f*ck me its going to die" to a bit of a shudder if you get what i mean. a blip of the throttle makes it ok again for a few seconds before it comes back, but nowhere near as bad as it was.

i am told that all of them do run a little rough compared to modern day cars, but ive got nothing to compare it to