Hei Timing And Carb setup Help

[twoskies]

hey

1979 350 with hei and rochester quadrajet, have timing set at 8 advance, secondary choke on carb is unhooked(was already like this) motor starts up on electric choke, primary door opens after a minute or two, motor then has to be set at a high idle or it wants to slowly lope down and die, it does start right back up and you can keep it running by feathering the gas
does run a little rough after choke kicks off

do i need more advance(have seen some setting at up to 16)

or is it possibly a carb issue , setup, or secondary choke that is not hooked up

thanks for any help