Man, talk about a jerk manuever on the part of dude backing out on ya. I hope the guy that said he was gonna tune it isn't the same guy that sold you the kit?
One of the down sides to that 90ci kit is the fact that it's a PITA to tune. Least that's what I've been told.
I wish I could help but tunning is not my strong point.
I was just wanting to know if you'd post the name of the guy or the shop this guy works for. That way other Buellers in your area will know not to make the same mistake.
http://xoptiinside.com
Try the above link. Guy is kind of hard to get in touch with but he knows his stuff when it comes to tuning.
That's about all the help I can be on this one.
Good luck