Metric function is ONLY for the 2004-2008. I do not have the capability to modify the older firmware so you are pretty much a current as you're going to get.
As for 89 vs. 91, the canned tuning is still pretty conservative so I wouldn't really worry about it.
Get with me about the updates tomorrow and we'll get you back on track.
Take care.
__________________
Bill Cohron - The Mad Doctor  
Power Hungry Performance - The ORIGINAL in Ford performance tuning... Since 1997!
(678) 890-1110
www.gopowerhungry.com - Home of the Hydra Chip, Minotaur Tuning Software, and the new Orion Reflash System for Navistar!
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