What options did the 93 have vs yours? If your car's loaded and his isn't that would help to explain why his is quicker. 93's were also SD and for some reason ran a little stronger than the EFI cars.
BTW I have ran ET Streets for the last 2-3 years on my 10 bolts with the same mods (now more) and haven't broke it yet. New diff is being put in until I can buy something better.

