1965 gmc 1000 Stromberg WW on a 305e rebuild question

[Gls]

So i got the truck a few months ago. I have cleaned, lined and sealed fuel tank, new sending unit and fuel pump and rebuilt the Stromberg ww. It runs good from idle to hard acceleration but i can not get it to idle right while in drive. It drops 300 rpms when in drive and dies. Also i have to keep my foot on the gas just a smidge while at a stop to keep it running. Would this be a linkage or power valve or vacuum. It does seem to be running rich. I have done some research on Stromberg carbs and those would be my best guess but i am hoping someone could help me out with their knowledge.

Also what plugs should i run in it? I cant get the ac c44ns i have seen recommended.
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