Man, I used to think I didn't feel a big difference either, until I returned it to stock to bring it to the dealer. The thing felt like a pig!!!
But I don't think it was a HP or Torque thing, I am firmly convinced it was more the tranny shifts that I really felt. That's why I'm holding out for tranny support from either Diablo or SCT before I do the cam...

 

Gotta argee with you there Hammer, I had to de-tune the truck back to stock after running the 91 for over a year straight to take it down to get a few things looked at and it just didn't feel right, more sluggish than anything.

As for th OP, something isn't right, call SC Customer service and talk to them.

 

SC has a forum site but I thought (never done it myself though) the only way to restore the OEM tune was to go through the process and then the SC would be unlocked. If it is still VIN locked then something is stored inside it.

 

ya I put mine back to stock for a week and it shifted like crap compared to how it shifts with it on 91. you should definatly be able to tell the difference.