I've been thinking about this recently and the Chevy S-10 forum still has these pics fortunately.
It was a pretty big learning experience.
I'm not sure how much power it made but I had it making 12psi.

 

Pretty neat.

For the manifold; was it a header that was cut from the head flange and flipped upside down?

 

Yup, that was pretty much the only way i could think of how I could make it lol