In general, there's not enough of a noticeable difference between the 87 and 89 programs to warrant the expense of an additional tune. We usually end up going with 87 performance, 87 towing, and 93 performance for most applications. If you don't have a need for the towing program, save the $30.00 and just go with the 87 and 93 performance.
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Bill Cohron - The Mad Doctor  
Power Hungry Performance - The ORIGINAL in Ford performance tuning... Since 1996!
(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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