The early on EXTRA-10 suspensions had no extra travel in the front any way. If you look at the specs the rear had the extra travel, but the front maintained the same 8" suspension. It was all a marketing gimmik at the time.
'92 Indy 650
'95 Indy XLT 600, plastic skis, skid plate, cobra windshield, XTRA 10, full Fox package, 1" riser