ADSW is the final release for the ABFS PROM that came in some base model 1987, 305, TBI, 4-Speed pick ups.

I'd like to build tune on the stock code but a PO installed a "performance" chip that is based on the original ABFS code and carries with it the issues that caused it to be replaced with the ADSW code.

GM Part number for the ADSW PROM is 16073334.

I checked Moates file share but it bore no fruit.

Thanks in advance.

Did you look here?
http://www.diy-efi.org/gmecm/ecm_info/1227747/

Edit, sorry, it was ASDW there. I do see a ARPC though.

Yea, that one has caught me more thqan once.
I'm working with another bin but would still like a copy of the original, the search continues.