and as far as "stock 383 specs" what do you need? hp/tq only?

depends on which year and variant, but I think most of the 2bbl 383s were 290-ish HP, and the 4bbls were around 330-335Hp. I don't remember the torque numbers off the top of my head though.

EDIT: DOH! that's what happens when your posting at work, something comes up that needs your attention when you're in mid-post, you comeback, finish your post, and find out that someone already beat you to it by 10 minutes!