83 300 D Black smoke after IP install

[green83300d]

83 300D - I installed a good used IP since the original IP had no output - at first when it was when hot & then eventually no output any time. Did the test of hooking up to a can of diesel , priming & still nothing.
Anyway now with the other IP in, it runs GREAT but it smokes badly on startup, it hunts during cold idle (which I believe is the rack bolt). It smokes badly during idle and when punching it & cruising. Basically I can't drive it because it about chokes you & anyone around & behind it.
I've adjusted the pump timing & even advanced it a little to ~30 deg.
When I first put this IP in I had to crank up the idle screw 3 or 4 turns to get it to idle also. So now I think it's dumping to much fuel all the time for some reason.
The IP looks to be from an 85 since it has the block on the engine side above the mounting bolt like my friend's 85. I've been working on it weekly with no progress & need to get it cleared up so I can drive it again.
Thanks for any help.