Greetings, and welcome to the forum!
I'd suggest finding another 3100 at a local wrecking yard. Try checking on
http://car-part.com/
That engine was used in many GM mid size cars from 94-95. It shouldn't be hard to find one for less than $600.
The 3100 has more HP/Torque and better gas millage.
I wonder if they guys on
www.60degreev6.com ever discussed this?